[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@faulpletz Do you mean with "and the guest systems continue to work
normally" that the guest does not have any read-only problems any more
with your patch?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@Tommy Eriksen, I believe the current status is that we have no idea.
Every time when I think we are getting close on the cause of the
problem, there comes proof that it is not the cause of the problems. For
us it already critical for months.

We are in the middle of moving our systems. I know @jsalisbury is doing
the best he can and @faulpeltz is doing his best effort too, but the
truth is that we are nowhere. It can still take months for the issue to
be solved.

Sorry for this message, but I think we should be clear on this. This
problem can only be solved with extra (testing) manpower.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@faulpeltz I confirm the timing. I was never as specific as you are now.
I already mentioned earlier that it always happens towards the end of
the backup. I would not be surprised if the crash happens during the
merge.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@emsi I had that problem too, you should ignore the binutils upgrade. I
had a look at the CHANGELOG of binutils and there is no significant
change. So the installation should continue although there is a
dependency mismatch. I cannot recall exactly what I fix the mismatch.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury Maybe you can also create a 4.2.0 kernel with cd4842f4
reverted. Then I can test one.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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Re: [Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury I would not be surprised by that. It would explain the pain
in finding the cause of this bug. Its outside of any of our scopes.
Moreover, when you read the commit message
(https://github.com/torvalds/linux/commit/cd4842f4), it seems that there
is quite some controversial, probably thoughtful but still, stuff
committed there.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@alexng-v I only had this while doing backups. Also, in the initial post
on MS Technet refers to it as a backup problem:
https://social.technet.microsoft.com/Forums/windowsserver/en-US
/8807f61c-565e-45bc-abc4-af09abf59de2/ubuntu-14042-lts-generation-2
-scsi-errors-on-vss-based-backups. We are now running HyperV with linux
VMs for over a year (in production) and we only see it during backups.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@elupus This is in line with our observations. Our guess is that the
change to a read-only state occurs during/just befor/just after a FREEZE
and/or THAW.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

For the information, this is the commit
https://github.com/torvalds/linux/commit/c01fac1c77a00227f706a1654317023e3f4ac7f0.
It would indeed make no sense at all when this would cause the thing.
How would the backup procedure even touch those lines of code?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress
Status in linux source package in Xenial:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury Thanks for the work already. It's good new information to
have. We are getting closer with finding the exact cause of the issue. I
am sure we will find it any time soon now!

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury The Windows Version is the same. Regarding the hv_vss_daemon
I am using the latest recommended version of the operating system. For
Ubuntu that means I am installing tools and cloud tools. For CentOS I am
using hypervvssd.x86_64 0-0.26.20150402git.el7.

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You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@trash1-z No, I believe that was never posted. Though we do know people
with 12.04 were hit too. However, I did post the version of my CentOS
machine that was never hit by the bug (to date), while all my Ubuntu
were hit frequently. I started with kernel 3.13. The kernel version of
this CentOS machine was (and still is): 3.10.0-229.11.1.el7.x86_64 #1
SMP Thu Aug 6 01:06:18 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@alexng-v Thanks for the quick reply: that sounds good! I will let you
know what our experiences are.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury That is great, thanks. Now I can go testing for sure, but I
think the first confirmation we need is that there is no more crash when
your script to reproduce the issue is used.

Maybe @jrp can tell us what the reason why he thinks they found the
smoking gun. If he can indeed confirm there is no more issue with the
script, then I will go testing the build kernels.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp @alexng-v Great that we have more improvements! Were you already
able to to not see any more crashes during backup while using the script
created by @jsalisbury?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@trash1-z I also see that message when a backup succeeds. Just like I
see it when a backup fails.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@trash1-z Earlier reports indicate that that is not an error. The
message is benign.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Just discovered in the CHANGELOG
(http://changelogs.ubuntu.com/changelogs/pool/main/l/linux/linux_4.2.0-30.35/changelog)
that 4.2.0-27 does not include the major storvsc update @jrp is talking
about. The referred updates were included 4.2.0-28 and distributed in
linux-image-4.2.0-30-generic. My auto-updater installed the update
yesterday morning. Furthermore, it looks like we still got the
connectivity issue (even though I disabled IPv6). Yesterday our line was
suddenly broken again without any log in our /var/log/syslog.
#justsaying.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@trash1-z, thanks just disabled it. let's see what happens.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@arune See attached my list of installed packages. That is correct,
right? My running kernel is (uname -a) Linux VPS-Web-Produc-Genkgo
4.2.0-27-generic. And ps -aux |grep hv says.

[hv_vmbus_con]
/usr/lib/linux-tools/4.2.0-27-generic/hv_fcopy_daemon
/usr/lib/linux-tools/4.2.0-27-generic/hv_vss_daemon
/usr/lib/linux-tools/4.2.0-27-generic/hv_kvp_daemon

That should be correct, right?

** Attachment added: "sudo dpkg -l |grep linux-*"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+attachment/4574189/+files/dpkg

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Upgrading the kernel does not help this issue. Moreover, the upgrade
gives new issues. For the third time now, the network of one of the
Ubuntu VMs suddenly goes down. As so it seems. There is nothing in
/var/log/syslog that indicates that the VM has a problem. It is
continuing its work. But from the outside the VM is unreachable. This
was a problem we never had before the upgrade. There were no significant
other changes. I am downgrading my machines back to Vivid.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@trash1-z Completely corrupted fs? That is not good. How long are you
chasing this bug? Was everything ok (except for the read-only problems)
before the upgrade to 4.2.0-27? Because, then I might downgrade my OS to
3.19 which was working fine.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@trash1-z Was it still corrupted after the reboot?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Thanks @jrp. Then the Wily kernel I installed did not help. Should
4.2.0-27 have the patches you were talking about?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp Does it matter to install -virtual packages? I have never done
that. Should I?

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Just upgraded to 4.2.0-27-generic #32~14.04.1-Ubuntu SMP Fri Jan 22
15:32:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux. Let's see what
happens.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

First backup failed immediately. We are noticing two more things.

First, the failed mount of today fails more often than other mounts. It
is not the mount of the OS, but a second added disk (mounted in
/dev/sdb1). I have attached the output for /etc/mtab and /etc/fstab of
the specific machine that failed. Maybe it helps.

Secondly, backups always switch to read-only at almost the same time:
near the end of the backup. I cannot say exactly when, but our backups
usually take 4 hours. And failures are always (approx) within the last
half hour.

** Attachment added: "mtab and fstab"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+attachment/4567116/+files/mount

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp Thanks, then I will upgrade any time soon, great to hear that you
have extra people to help solving!

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp Could you confirm that if I upgrade my machines today to the wily
kernels that there are (probably) many improvements to this issue? At
this moment I have the vivid kernels installed.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Thanks @lauwersm and @decui. Our comments seem to have no effect at all.
Yesterday was a read-only day again. Just two weeks after the previous
one. So now it happens two times a month, which is 2 out of 8 backups.
This is just too often, too expensive in labour and really unworkable.

Also, the write latency is extraordinary. Yesterday some data import was
busy (over the network) when the backup started. Took more than 3 hours
to complete. After backup was finished, I started the import again, just
to see the difference. Took just 45 minutes. I would be more than happy
to show an engineer our problem.

Maybe someone knows how to soft reboot a machine when in read-only
state? This could help reducing the pain. But I really really want to
urge getting a final solution. The problem was issued at April 30. My
report at the Microsoft forum was at May 8, and that was after 40 days
of problems already. So this bugging us for almost 10 months.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Is there anything I can do to help? After @jsalisbury posted the method
to reproduce the issue and there was a sign of commitment by @decui, we
decided to postpone our decision of moving away from Hyper-V.

Now we have yet again the general feeling that this issue will not be
solved soon. While I can totally understand that other things have
higher priority than this, I cannot understand the lack of
communication. It would be at least kind to let people know what they
can expect. Is it really going to last one full year to have this bug
solved?

Generally, I am not the kind of guy that puts pressure on open source
projects, but this is so frustrating. The costs of this bug are too
high. If the importance is "High", why do I feel that this everything
but important? Still hope to see a real solution any time soon.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

If those commits could just be fixes for the problem we are having, that
would be a really good start of 2016!

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@decui Correct, ceteris paribus, the only changes were more of the same
(disk space) and some package changes through apt-get update (Ubuntu
14.04 LTS). My guess is that the downgrade is related to one of the two.
But I agree, let's postpone this one, until the read-only bug is fixed.
Afterwards, I will upgrade my production kernels to the latest stable
4.x kernel with the patch applied (I just read that the HWE kernel for
14.04 is going to 4.x in January anyhow). Then the performance might be
different after all.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@decui @jsalisbury That is indeed good news. Since we did not make any
changes to our platform yet, we can help to test possible fixes. There
were also some questions.

1. Occurrence of the issue: with the fixes of bug #1445195 the amount of
read-only errors reduced drastically. But it is still there. We are
making backups two times a week on three Ubuntu machines, and read-only
occurs I believe once a month. And when a machine goes read-only, it is
always just one machine, not all three. This situation requires us to
create backups during working days because then we are able to restart
machines immediately, hence causing little downtime.

2. Specificness of the issue: it is indeed a Ubuntu only problem, at
least for us. In our Hyper-V cluster we have four virtual machines,
three Ubuntu, one CentOS. The latter never suffered from the read-only
problem.

3. IO-spike issue: you are correct that we have a I/O performance
downgrade. And I now for sure it is related to backups. During a week we
never have any I/O problems, only those exactly two times a week when we
create backups. This downgrade came up recently, at least we are feeling
the downgrade now. The cause might be that more and more disk space is
getting occupied. Or that was a (kernel) update that is causing this
issue. But my guess (and it is really a guess) is that is caused by the
disk space and therefore the amount of data to backup.

Regarding our system. Since the fixes for bug #1445195 were released, we
switched back to the latest 3.13 kernel in our production environments.
But if I need to switch kernel to help fixing the bug, I think that
would be no problem. Luckily we can now, with the work of @jsalisbury,
do this without problems on a testing machine. Thank you for the work so
far already!

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@decui Regarding downgrade, I think I might not have been clear on this.
The downgrade occurs only when there are backups running. Our
performance otherwise is great. This (new) problem is not necessarily
related to this specific issue, but more to backups on Hyper-V in
general. Nonetheless, as I stated earlier, the problem is limiting us
(even further) when and how many backups we are creating. This is far
from an idealistic situation.

As I said, the cause of this problem might be occupied disk space. We
have not changed anything else on our platform or setup, other than
running the usual apt-get upgrades. Further, please see comment #47
where another user made a similar comment regarding performance
downgrade. Maybe it is better if I create a separate bug report for this
issue. Finally, regarding the downgrade issue, I am also prepared to
provide access to our machines to employees of Microsoft and Ubuntu, if
required.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

This problem started more than a year ago, I decided together with my
hoster to look at alternatives. Backup is the only thing that is causing
problems for us with HyperV. The problem is two fold. First, the read-
only state machines get into when generating the backup. Second, the
read/write spike we see during a backup.

While this topic is focussed on the backups, the latter (spikes) is more
and more causing problems. The more data getting on the disk, the higher
the spikes are. Http requests that usually take < 100 ms are causing
multiple seconds. More specifically, requests that involve write
operations tend to have these characteristics. The read-only already
made us reduce the amount of backups, because we want to decrease the
risk of downtime. Now, with this (new) problem, it is almost impossible
that a client does not suffer from a backup. That situation is wrong.

Since, it is so hard to debug (impossible for us to replicate behaviour
on a test machine) and it is hard to tell when the problem will be
solved, we decided, after a year, to look at alternatives. Nonetheless,
thanks for the help we got here. That is much appreciated.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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Re: [Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Since I was on holidays, I will give this a try in next two weeks.
Thanks for the effort @jalisbury.

> On 20 Nov 2015, at 15:06, Joseph Salisbury  
> wrote:
> 
> I'll see if I can figured out why the 3.10 based kernel doesn't boot.
> However, it may just be easier to test the Precise kernel, which is 3.2
> based.
> 
> The latest Precise kernel can be downloaded from:
> https://launchpad.net/~ubuntu-security/+archive/ubuntu/ppa/+build/8272116
> 
> -- 
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1470250
> 
> Title:
>  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
>  Backups
> 
> Status in linux package in Ubuntu:
>  In Progress
> Status in linux source package in Trusty:
>  In Progress
> Status in linux source package in Utopic:
>  In Progress
> Status in linux source package in Vivid:
>  In Progress
> Status in linux source package in Wily:
>  In Progress
> 
> Bug description:
>  Customers have reported running various versions of Ubuntu 14.04.2 LTS
>  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
>  will be mounted Read-Only due to a "disk error" (which really isn't
>  the case here).As a result, they must reboot the Ubuntu guest to
>  get the file system to mount RW again.
> 
>  The Error seen are the following:
>  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: 
> Sense Key : Unit Attention [current] 
>  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
> Sense: Changed operating definition
>  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
> Warning! Received an indication that the operating parameters on this target 
> have changed. The Linux SCSI layer does not automatically adjust these 
> parameters.
>  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
> vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
>  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
> vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
>  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: 
> Sense Key : Unit Attention [current] 
>  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
> Sense: Changed operating definition
>  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
> Warning! Received an indication that the operating parameters on this target 
> have changed.  The Linux SCSI layer does not automatically adjust these 
> parameters.
> 
>  This relates to the VSS "Windows Server Backup" process that kicks off at 
> midnight on the host and finishes an hour and half later.   
>  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
> kernel version we have.   We're currently running kernel version 
> 3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. 
> -- We see the same errors on both.
>  As a result, we've been hesitant to drop any more ubuntu guests on our 
> 2012R2 hyper-v system because of this.   We can stop the backup process and 
> all is good, but we need nightly backups to image all of our VM's.   All the 
> windows guests have no issues of course.   We also have some CentOS based 
> guests running without issues from what we've seen.
> 
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 

[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury uname -a for the CentOS machines is: Linux host.name
3.10.0-229.11.1.el7.x86_64 #1 SMP Thu Aug 6 01:06:18 UTC 2015 x86_64
x86_64 x86_64 GNU/Linux. This machine was never hit by the backup issue.

The technet link you posted contains the following quote: "As a result,
we've been hesitant to drop any more ubuntu guests on our 2012R2 hyper-v
system because of this.   We can stop the backup process and all is
good, but we need nightly backups to image all of our VM's.   All the
windows guests have no issues of course.   We also have some CentOS
based guests running without issues from what we've seen."

So I am not the only one that is seeing this behaviour.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@stuart-luscombe So if I understand correctly, the reason why you
installed the daemons was to get full file indexes and no complaints by
monitoring software. However, the downside is that the VMs started
crashing during backups after the install? More importantly, can you
confirm there was no problem with backups before installing the daemons?

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@stuart-luscombe That is interesting. So if we combine both our
observations, then my conclusion is: there must be something in the
hyper v daemons. And one the things to look at is where the Ubuntu
daemons might differ from the CentOS daemons. Maybe @jsalisbury knows if
there is any difference between the two? And also why are they
different?

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

What do you mean with: did not occur until you followed those
instructions? You mean without the daemons everything was fine?

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

A little remark that still has no answer yet: what are the Ubuntu
specifics that cause this issue? In the 10 months we have these machines
running: many crashes for Ubuntu with VSS snapshots while the CentOS
machines have had no crash at all. Maybe @jsalisbury has a explanation
for this?

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp Thanks for that, I am happy to hear there is still being worked on. Let me 
know if there is a build that I can test
@h-lbuntu-2 How are your results with Willy kernels?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

Unfortunately, I did not have had time to test Willy kernels. But the
other 3.x stable kernels are still contain the problem.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1490132] [NEW] Cannot boot with linux-image-extra-3.13.0-62-generic

[Frederik Bosch]

Public bug reported:

Since I upgraded to  linux-image-extra-3.13.0-62-generic, my personal
machine is not able to boot any longer. I have to choose Advanced
Options and boot with the 3.13.0-61 kernel. I have no idea what is wrong
at this stage.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-61-generic 3.13.0-61.100
ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
Uname: Linux 3.13.0-61-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.12
Architecture: amd64
AudioDevicesInUse:
 USERPID ACCESS COMMAND
 /dev/snd/controlC1:  frederik   2780 F pulseaudio
 /dev/snd/controlC0:  frederik   2780 F pulseaudio
CurrentDesktop: Unity
Date: Sat Aug 29 12:44:01 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=53890464-2f0d-418d-8ce0-fbfce47e874d
InstallationDate: Installed on 2014-04-18 (497 days ago)
InstallationMedia: Ubuntu 13.10 Saucy Salamander - Release amd64 (20131016.1)
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic 
root=UUID=cd3b301a-86ec-4f7f-8e9a-9cd1081d8bbd ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-61-generic N/A
 linux-backports-modules-3.13.0-61-generic  N/A
 linux-firmware 1.127.15
RfKill:
 0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-19 (497 days ago)
dmi.bios.date: 01/17/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P2.00
dmi.board.name: FM2A88M Extreme4+
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP2.00:bd01/17/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A88MExtreme4+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

** Affects: linux (Ubuntu)
 Importance: Undecided
 Status: Confirmed


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1490132

Title:
  Cannot boot with linux-image-extra-3.13.0-62-generic

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Since I upgraded to  linux-image-extra-3.13.0-62-generic, my personal
  machine is not able to boot any longer. I have to choose Advanced
  Options and boot with the 3.13.0-61 kernel. I have no idea what is
  wrong at this stage.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-61-generic 3.13.0-61.100
  ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
  Uname: Linux 3.13.0-61-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC1:  frederik   2780 F pulseaudio
   /dev/snd/controlC0:  frederik   2780 F pulseaudio
  CurrentDesktop: Unity
  Date: Sat Aug 29 12:44:01 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=53890464-2f0d-418d-8ce0-fbfce47e874d
  InstallationDate: Installed on 2014-04-18 (497 days ago)
  InstallationMedia: Ubuntu 13.10 Saucy Salamander - Release amd64 
(20131016.1)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic 
root=UUID=cd3b301a-86ec-4f7f-8e9a-9cd1081d8bbd ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-61-generic N/A
   linux-backports-modules-3.13.0-61-generic  N/A
   linux-firmware 1.127.15
  RfKill:
   0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-19 (497 days ago)
  dmi.bios.date: 01/17/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.00
  dmi.board.name: FM2A88M Extreme4+
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP2.00:bd01/17/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A88MExtreme4+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1490132] Re: Cannot boot with linux-image-extra-3.13.0-62-generic

[Frederik Bosch]

I think I found the solution to this bug: 3.13.0-62 was not installed
correctly.  This is due to the fact that fgrlx was upgraded too. During
this update the question `whether you would like to keep you config` is
asked. But you have to expand (view details) the window to actually see
that this question is asked.  Otherwise, the upgrade process will not
continue. I think I quit the previous upgrade of this package
accidentally, leading to an unfinished install of the kernel.

So I think this is not a bug of 3.13.0-62, but a usability bug of the
upgrade process.

-- 
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https://bugs.launchpad.net/bugs/1490132

Title:
  Cannot boot with linux-image-extra-3.13.0-62-generic

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Since I upgraded to  linux-image-extra-3.13.0-62-generic, my personal
  machine is not able to boot any longer. I have to choose Advanced
  Options and boot with the 3.13.0-61 kernel. I have no idea what is
  wrong at this stage.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-61-generic 3.13.0-61.100
  ProcVersionSignature: Ubuntu 3.13.0-61.100-generic 3.13.11-ckt22
  Uname: Linux 3.13.0-61-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.12
  Architecture: amd64
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC1:  frederik   2780 F pulseaudio
   /dev/snd/controlC0:  frederik   2780 F pulseaudio
  CurrentDesktop: Unity
  Date: Sat Aug 29 12:44:01 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=53890464-2f0d-418d-8ce0-fbfce47e874d
  InstallationDate: Installed on 2014-04-18 (497 days ago)
  InstallationMedia: Ubuntu 13.10 Saucy Salamander - Release amd64 
(20131016.1)
  MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-61-generic 
root=UUID=cd3b301a-86ec-4f7f-8e9a-9cd1081d8bbd ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-61-generic N/A
   linux-backports-modules-3.13.0-61-generic  N/A
   linux-firmware 1.127.15
  RfKill:
   0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-19 (497 days ago)
  dmi.bios.date: 01/17/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: P2.00
  dmi.board.name: FM2A88M Extreme4+
  dmi.board.vendor: ASRock
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvrP2.00:bd01/17/2014:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnFM2A88MExtreme4+:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: To Be Filled By O.E.M.
  dmi.product.version: To Be Filled By O.E.M.
  dmi.sys.vendor: To Be Filled By O.E.M.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

Since this also helps on the backup issue: please merge these patches!

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https://bugs.launchpad.net/bugs/1445195

Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Fix Committed
Status in linux source package in Utopic:
  Fix Committed
Status in linux source package in Vivid:
  Fix Released
Status in linux source package in Wily:
  Fix Released

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@dander88 That sounds great, but we had the same results for a test VPS
machine. As indicated by @jrp before:  it depends on your IO load if the
machine goes into read-only. And test machines usually do not have that
many IO load.

-- 
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@cohn By the way, I have not installed the 4.x kernels yet. So I have no
idea how many dependency problems you will run in to. Could you let me
know?

-- 
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@dander88 According to @jrp the message Received an indication that the
operating parameters on this target have changed.  The Linux SCSI layer
does not automatically adjust these parameters. is beneign. He
mentioned that in bug 1445195.

Are you just seeing that message or do your systems also go into read-
only mode? From my point of view the SCSI message has no significance to
the read-only bug. The message also pops up with successful backups.

@h-lbuntu-2 What kind of bug do you mean? Also the SCSiI message? Or do
you also have read-only problems?

@cohn I would install them all. Be aware you might have to ignore
dependencies when you are on 14.04 and go to kernel 3.19, e.g. binutils.
Run dpkg --ignore-depends=binutils -i *.deb to install them. It is fine
to do that: those dependencies can be ignored without problems.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@dander88 Are you talking on the backup bug? Please report them in bug
1470250.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Fix Committed
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury I will start testing this week. However, I feel the latest
reports were pretty clear: the issue is there. While I was the only one
at first that still had problems, after a while more people reported (in
bug 1441595) that the new build still contains the issue. In my opinion,
it is now HyperV team's turn to come up with a final solution.
Nevertheless, I want to contribute where possible. /cc @jrp

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

That should have been bug 1445195.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jsalisbury I did not find any new commits on this subject in the
current kernel master (https://github.com/torvalds/linux). And I believe
you already included all HV commits in the last test build from bug
1441595.

So testing this test kernel would mean I am testing whether another
commit (not specifically for this issue) might have fixed this issue,
right?

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Utopic:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp @jsalisbury I am using this kernel:
http://kernel.ubuntu.com/~jsalisbury/lp1445195/vivid/ on 14.04.2. So
that build is much more stable but NOT a complete fix of the problem.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

@jrp @jsalisbury I am using this kernel:
http://kernel.ubuntu.com/~jsalisbury/lp1445195/vivid/ on 14.04.2. So
that build is much more stable but a complete fix of the problem.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1470250/+subscriptions

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[Kernel-packages] [Bug 1470250] Re: [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based Backups

[Frederik Bosch]

My latest report was that latest builds with patches are much more
stable but are also not a complete fix for the problem. It is still
there and occurs randomly. The error message is not changed. I have no
real indication what causes the read-only state. During the latest RO
state I noticed there was a IO peak at that time. However, the IO peak
was just unpacking some files from a tar.gz.

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Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.On a random Basis, the file system
  will be mounted Read-Only due to a disk error (which really isn't
  the case here).As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed. The Linux SCSI layer does not automatically adjust these 
parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc 
vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc 
vmbus_0_4: stor pkt 88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense 
Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. 
Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: 
Warning! Received an indication that the operating parameters on this target 
have changed.  The Linux SCSI layer does not automatically adjust these 
parameters.

  This relates to the VSS Windows Server Backup process that kicks off at 
midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct 
kernel version we have.   We're currently running kernel version 
3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- 
We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 
hyper-v system because of this.   We can stop the backup process and all is 
good, but we need nightly backups to image all of our VM's.   All the windows 
guests have no issues of course.   We also have some CentOS based guests 
running without issues from what we've seen.

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@brainv We will do similar tests this weekend and next week. Since we
actually faced the read-only mode once more, I am not feeling
comfortable yet with the current solution. I am going to try to
reproduce the io pattern that we had when system went into read-only. It
was something like `git clone` followed by `composer install` (PHP
package manager) followed by a php script that creates and migrates
mariadb database.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@stevez That means you were not able replicate the read-only issue we
had during our tests of the patched Vivid kernel?

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jsalisbury I guess so, I will try it asap.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp How did your Vivid testing do? Were you able to find any
particularities?

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp I have tried to discover if there were any differences between the
backup that failed and the other ones. I noticed this one thing. Before
or during backup (cannot recall exactly atm)  a 'composer install'
process was running. Composer is a php package manager. It downloads and
deploys many small files on the filesystem (download of multiple tar.gz
files that are being unpacked). This machine normally does nothing more
than serving http requests. It is the opposite of a high-load server. So
the composer process is an outlier compared to the usual operations.
Maybe this helps to reproduce the io pattern.

Thanks anyway for the work already. It makes a difference for sure. Hope
there will be a final solution anytime soon.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp Do you have any suggestions on my remarks above? After the machine
went intro read-only we rebooted and started the whole sequence again.
We did not have had any problems since then. As so it seems, the window
of opportunity for the bug to manifest has been decreased drastically.
However, I also think it has not been fixed completely.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp Could you indicate with which commits did you exactly tested the
bug on your side? I understand from jsalisbury that the base for the
current kernel is the master-next branch. He applied the patches
mentioned in his earlier post to that kernel. Are we missing any other
commits?

Another issue filed on read-only with Hyper-V also still occurs, see
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1439780. Can that
issue be related to this issue?

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

Build: 3.19.0-19-generic #19~lp1445195 SMP Tue May 26 17:43:16 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

Very unfortunate but the bug has been triggered again.

[154272.293488] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
[154272.293508] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
[154272.293665] sd 2:0:0:0: Warning! Received an indication that the operating 
parameters on this target have changed. The Linux SCSI layer does not 
automatically adjust these parameters.
[154272.293671] blk_update_request: I/O error, dev sda, sector 201805560
[154272.293718] Aborting journal on device sda1-8.
[154272.314119] EXT4-fs error (device sda1): ext4_journal_check_start:56: 
Detected aborted journal
[154272.314154] EXT4-fs (sda1): Remounting filesystem read-only

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@brainv We are seeing exactly the same. Backups are not crashing while
we are still creating backups every half an hour. Our perception is that
the bug is fixed, but we are going to add more boxes to see what happens
then.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jsalisbury: I only tested the Vivid build.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

Our tests are positive so far. Already creating backups for 19 hours,
with a backup every half an hour.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@brianv, you should run dpkg --ignore-depends=binutils -i *.deb to
install. The binutils update can be ignored (if you look at the
changelog it is a minor version bump without api changes). Maybe you
should try the 3.19 kernel: we do not have any booting problems while we
are also on trusty.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp: Ok. After reboot it was fine: just one process per daemon.
However, now I do not see any logs of FREEZE and THAW anymore (while
backups are successful). I do see the warning that the operating
parameters have changed. Probably nothing to worry about.

Nonetheless, being a programmer myself, I do like to see consistency in
the logs. It usually helps solving the problem. And when it is not
consistent, it is many times an indication that something is wrong.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

In addition to the previous message, there seemed to be two processes
running of the vss and kvp daemon (while there is only one instance of
fcopy). This is weird (I think), but I have seen it before with other
kernels. A reboot helps in that case. This can also be an explanation
for the received package from untrusted pid message. Not on topic, but
I wonder why there were two vss and kvp daemons running.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

We are starting backup tests with new Vivid kernel now.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

One thing I have noticed already, is new logs regarding received
packages.

May 27 16:30:18 Hyper-V VSS: VSS: op=FREEZE: succeeded
May 27 16:30:18 Hyper-V VSS: VSS: op=FREEZE: succeeded
May 27 16:30:18 Hyper-V VSS: Received packet from untrusted pid:2102
May 27 16:30:18 Hyper-V VSS: Received packet from untrusted pid:1086
May 27 16:30:18 Hyper-V VSS: VSS: op=THAW: succeeded
May 27 16:30:18 Hyper-V VSS: VSS: op=THAW: succeeded
May 27 16:30:18 Hyper-V VSS: Received packet from untrusted pid:2102
May 27 16:30:18  Hyper-V VSS: Received packet from untrusted pid:1086

And pids (2102 and 1086) are hv_vss_daemon processes.

root  1086  0.0  0.0   4332  1512 ?Ss   16:04   0:00 
/usr/lib/linux-tools/3.19.0-19-generic/hv_vss_daemon
root  2102  0.0  0.0   4332  1516 ?Ss   16:06   0:00 
/usr/lib/linux-tools/3.19.0-19-generic/hv_vss_daemon

Current kernel: 3.19.0-19-generic #19~lp1445195 SMP Tue May 26 17:43:16
UTC 2015 x86_64 x86_64 x86_64 GNU/Linux.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp: could you confirm that this might solve my issue with the 3.19
kernel? Is that specific commit required?

Because I was still seeing Warning! Received an indication that the
operating parameters on this target have changed. The Linux SCSI layer
does not automatically adjust these parameters. with every backup I
did.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

@jrp: did you test the 3.19 kernel or did you use trusty and/or utopic
build?

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

Another confirmation that the reported bugs are not fixed in the vivid
build. We have had another crash this morning, same log messages. It
took quite some hours longer than yesterday though, which confirms the
occurrences are still random (we are not able to see the pattern).

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

Testing in progress.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

No luck with the current build.

Linux VPS-Genkgo 3.19.0-18-generic #18 SMP Wed May 20 17:57:26 UTC 2015
x86_64 x86_64 x86_64 GNU/Linux

First backup was succesful, second one failed.

[ 2379.049088] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
[ 2379.049109] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
[ 2379.049131] sd 2:0:0:0: Warning! Received an indication that the operating 
parameters on this target have changed. The Linux SCSI layer does not 
automatically adjust these parameters.
[ 3439.820142] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
[ 3439.820163] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
[ 3439.820341] sd 2:0:0:0: Warning! Received an indication that the operating 
parameters on this target have changed. The Linux SCSI layer does not 
automatically adjust these parameters.
[ 3439.820350] blk_update_request: I/O error, dev sda, sector 201644056
[ 3439.820394] Aborting journal on device sda1-8.
[ 3439.824253] EXT4-fs error (device sda1): ext4_journal_check_start:56: 
Detected aborted journal
[ 3439.824285] EXT4-fs (sda1): Remounting filesystem read-only

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You received this bug notification because you are a member of Kernel
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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Precise:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

To manage notifications about this bug go to:
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[Kernel-packages] [Bug 1456985] [NEW] Filesystem goes read-only while creating backups on HyperV

[Frederik Bosch]

Public bug reported:

Because ubuntu-bug linux not works because I am on kernel 3.19.0-17, I
create this report manually.

Summary of problem: we create backups with HyperV of 4 linux virtual
machines. There is 1 CentOS machine (XFS) and 3 Ubuntu 14.04 machines
(EXT4). Problems occur on the Ubuntu machine only and have occurred on
multiple hypervisors (physical machines). During the start or at the end
of the creation of a snapshot, the filesystem switches to read-only
mode. This happens at completely random moments: at least we are not
able to detect a pattern. What we find weird is that the CentOS machine
with XFS is not having any problems.

What actions did we undertake to get rid of problem? We tried multiple
backup strategies with HyperV, including snapshots and exports. When
this was not successful, we were adviced by the #ubuntu-kernel chat
channel to upgrade our kernel to 3.19.0-17 (coming from 3.13.0-52). The
reasons that this could solve the problem is that hyperv backups require
freeze and thaw methods (https://msdn.microsoft.com/en-
us/library/aa384589%28v=vs.85%29.aspx). Unfortunately the problem did
not go away.

The message we get from dmesg when the filesystem goes read-only is as
follows on the 3.19.0-17 kernel:

[85630.239889] blk_update_request: I/O error, dev sda, sector 201697672
[85630.239931] Aborting journal on device sda1-8.
[85630.253386] EXT4-fs error (device sda1): ext4_journal_check_start:56: 
Detected aborted journal
[85630.253428] EXT4-fs (sda1): Remounting filesystem read-only

While it was as follows on the 3.13.0-52 kernel (different machine):

[66392.076569] end_request: I/O error, dev sda, sector 65127256
[66392.076610] Aborting journal on device sda5-8.
[66392.280052] EXT4-fs error (device sda5): ext4_journal_check_start:56: 
Detected aborted journal
[66392.280090] EXT4-fs (sda5): Remounting filesystem read-only
[66392.482903] EXT4-fs error (device sda5): ext4_journal_check_start:56: 
Detected aborted journal

System details:
- Version signature: Ubuntu 3.19.0-17.17~14.04.1-generic 3.19.6
- lspci.log: http://paste.ubuntu.com/11242312/
- boot.log: http://paste.ubuntu.com/11242303/

** Affects: linux (Ubuntu)
 Importance: Undecided
 Status: Incomplete

** Description changed:

  Filesystem goes read-only while creating VSS snapshot on HyperV
  
  Because ubuntu-bug linux not works because I am on kernel 3.19.0-17, I
  create this report manually.
  
  Summary of problem: we create VSS snapshots with HyperV of 4 linux
  virtual machines. There is 1 CentOS machine (XFS) and 3 Ubuntu 14.04
  machines (EXT4). Problems occur on the Ubuntu machine only and have
  occurred on multiple hypervisors (physical machines). During the start
  or at the end of the creation of a snapshot, the filesystem switches to
  read-only mode. This happens at completely random moments: at least we
  are not able to detect a pattern. What we find weird is that the CentOS
  machine with XFS is not having any problems.
  
  What actions did we undertake to get rid of problem? We tried multiple
  backup strategies with HyperV. When this was not successful, we were
  adviced by the #ubuntu-kernel chat channel to upgrade our kernel to
  3.19.0-17 (coming from 3.13.0-52). The reasons that this could solve the
  problem is that hyperv backups require freeze and thaw methods
  (https://msdn.microsoft.com/en-us/library/aa384589%28v=vs.85%29.aspx).
  Unfortunately the problem did not go away.
  
  The message we get from dmesg when the filesystem goes read-only is as
  follows on the 3.19.0-17 kernel:
  
  [85630.239889] blk_update_request: I/O error, dev sda, sector 201697672
  [85630.239931] Aborting journal on device sda1-8.
  [85630.253386] EXT4-fs error (device sda1): ext4_journal_check_start:56: 
Detected aborted journal
  [85630.253428] EXT4-fs (sda1): Remounting filesystem read-only
  
- While it was as follows on the 3.13.0-52 kernel:
+ While it was as follows on the 3.13.0-52 kernel (different machine):
  
  [66392.076569] end_request: I/O error, dev sda, sector 65127256
  [66392.076610] Aborting journal on device sda5-8.
  [66392.280052] EXT4-fs error (device sda5): ext4_journal_check_start:56: 
Detected aborted journal
  [66392.280090] EXT4-fs (sda5): Remounting filesystem read-only
  [66392.482903] EXT4-fs error (device sda5): ext4_journal_check_start:56: 
Detected aborted journal
  
  System details:
  - Version signature: Ubuntu 3.19.0-17.17~14.04.1-generic 3.19.6
  - lspci.log: http://paste.ubuntu.com/11242312/
  - boot.log: http://paste.ubuntu.com/11242303/

** Summary changed:

- Filesystem goes read-only while creating VSS snapshot on HyperV
+ Filesystem goes read-only while creating backups on HyperV

** Description changed:

- Filesystem goes read-only while creating VSS snapshot on HyperV
- 
  Because ubuntu-bug linux not works because I am on kernel 3.19.0-17, I
  create this report manually.
  
- Summary of problem: we create VSS snapshots with HyperV of 4 linux
- virtual 

[Kernel-packages] [Bug 1445195] Re: [Hyper-V] Kernel patches for storvsc

[Frederik Bosch]

The problem we encountered with HyperV backups, filed here:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1456985, should be
solved by these patches too.

Our bug is an exact copy of the initial bug that was reported here:
https://social.technet.microsoft.com/Forums/windowsserver/en-US
/8807f61c-565e-45bc-abc4-af09abf59de2/ubuntu-14042-lts-generation-2
-scsi-errors-on-vss-based-backups.

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Title:
  [Hyper-V] Kernel patches for storvsc

Status in linux package in Ubuntu:
  Triaged
Status in linux source package in Trusty:
  Triaged
Status in linux source package in Utopic:
  Triaged
Status in linux source package in Vivid:
  Triaged
Status in linux source package in Wily:
  Triaged

Bug description:
  Storage driver performance updates for vivid

  K. Y. Srinivasan (7):
scsi: storvsc: Increase the ring buffer size
scsi: storvsc: Size the queue depth based on the ringbuffer size
scsi: storvsc: Always send on the selected outgoing channel
scsi: storvsc: Retrieve information about the capability of the target
scsi: storvsc: Fix a bug in copy_from_bounce_buffer()
scsi: storvsc: Don't assume that the scatterlist is not chained
scsi: storvsc: Set the tablesize based on the information given by the host

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[Kernel-packages] [Bug 1456985] Re: Filesystem goes read-only while creating backups on HyperV

[Frederik Bosch]

@brad-figg: I just found out that this bug will be solved by
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1445195.

** Changed in: linux (Ubuntu)
   Status: Incomplete = Confirmed

** Changed in: linux (Ubuntu)
   Status: Confirmed = Fix Committed

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Title:
  Filesystem goes read-only while creating backups on HyperV

Status in linux package in Ubuntu:
  Fix Committed

Bug description:
  Because ubuntu-bug linux not works because I am on kernel 3.19.0-17,
  I create this report manually.

  Summary of problem: we create backups with HyperV of 4 linux virtual
  machines. There is 1 CentOS machine (XFS) and 3 Ubuntu 14.04 machines
  (EXT4). Problems occur on the Ubuntu machine only and have occurred on
  multiple hypervisors (physical machines). During the start or at the
  end of the creation of a snapshot, the filesystem switches to read-
  only mode. This happens at completely random moments: at least we are
  not able to detect a pattern. What we find weird is that the CentOS
  machine with XFS is not having any problems.

  What actions did we undertake to get rid of problem? We tried multiple
  backup strategies with HyperV, including snapshots and exports. When
  this was not successful, we were adviced by the #ubuntu-kernel chat
  channel to upgrade our kernel to 3.19.0-17 (coming from 3.13.0-52).
  The reasons that this could solve the problem is that hyperv backups
  require freeze and thaw methods (https://msdn.microsoft.com/en-
  us/library/aa384589%28v=vs.85%29.aspx). Unfortunately the problem did
  not go away.

  The message we get from dmesg when the filesystem goes read-only is as
  follows on the 3.19.0-17 kernel:

  [85630.239889] blk_update_request: I/O error, dev sda, sector 201697672
  [85630.239931] Aborting journal on device sda1-8.
  [85630.253386] EXT4-fs error (device sda1): ext4_journal_check_start:56: 
Detected aborted journal
  [85630.253428] EXT4-fs (sda1): Remounting filesystem read-only

  While it was as follows on the 3.13.0-52 kernel (different machine):

  [66392.076569] end_request: I/O error, dev sda, sector 65127256
  [66392.076610] Aborting journal on device sda5-8.
  [66392.280052] EXT4-fs error (device sda5): ext4_journal_check_start:56: 
Detected aborted journal
  [66392.280090] EXT4-fs (sda5): Remounting filesystem read-only
  [66392.482903] EXT4-fs error (device sda5): ext4_journal_check_start:56: 
Detected aborted journal

  System details:
  - Version signature: Ubuntu 3.19.0-17.17~14.04.1-generic 3.19.6
  - lspci.log: http://paste.ubuntu.com/11242312/
  - boot.log: http://paste.ubuntu.com/11242303/

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[Kernel-packages] [Bug 1410278] Re: package linux-cloud-tools-common 3.16.0-29.39 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Frederik Bosch]

I had the same issue when I wanted to upgrade to newer kernel. So I
first added ppa:canonical-kernel-team/ppa, upgrade my kernel and then
installed the new tools and cloud tools. Then got the issue.

I solved it by removing the ppa. This allowed me to remove the newer
tools and cloud tools, then removing the tools and cloud tools from my
older kernel. Now with no cloud tools and tools installed, I added the
ppa again and install the tools and cloud tools successfully.

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https://bugs.launchpad.net/bugs/1410278

Title:
  package linux-cloud-tools-common 3.16.0-29.39 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  $ cat /proc/version_signature 
  Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1

  $ lsb_release -rd
  Description:  Ubuntu 14.10
  Release:  14.10

  $ apt-cache policy linux-cloud-tools-common 
  linux-cloud-tools-common:
Installed: 3.16.0-29.39
Candidate: 3.16.0-29.39
Version table:
   *** 3.16.0-29.39 0
  500 http://archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 
Packages
  500 http://archive.ubuntu.com/ubuntu/ utopic-security/main amd64 
Packages
  100 /var/lib/dpkg/status
   3.16.0-28.38 0
  500 http://archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 
Packages
  500 http://archive.ubuntu.com/ubuntu/ utopic-security/main amd64 
Packages
   3.16.0-26.35 0
  500 http://archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 
Packages
  500 http://archive.ubuntu.com/ubuntu/ utopic-security/main amd64 
Packages
   3.16.0-25.33 0
  500 http://archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 
Packages
  500 http://archive.ubuntu.com/ubuntu/ utopic-security/main amd64 
Packages
   3.16.0-24.32 0
  500 http://archive.ubuntu.com/ubuntu/ utopic-updates/main amd64 
Packages
  500 http://archive.ubuntu.com/ubuntu/ utopic-security/main amd64 
Packages
   3.16.0-23.31 0
  500 http://archive.ubuntu.com/ubuntu/ utopic/main amd64 Packages

  ProblemType: Package
  DistroRelease: Ubuntu 14.10
  Package: linux-cloud-tools-common 3.16.0-29.39
  ProcVersionSignature: Ubuntu 3.16.0-28.38-generic 3.16.7-ckt1
  Uname: Linux 3.16.0-28-generic x86_64
  NonfreeKernelModules: nvidia wl
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  AudioDevicesInUse:
   USERPID ACCESS COMMAND
   /dev/snd/controlC1:  kjcole 5009 F pulseaudio
   /dev/snd/controlC0:  kjcole 5009 F pulseaudio
   /dev/snd/seq:timidity   2477 F timidity
  Date: Tue Jan 13 09:00:21 2015
  Dependencies: lsb-base 4.1+Debian11ubuntu8
  DuplicateSignature: package:linux-cloud-tools-common:3.16.0-29.39:subprocess 
installed post-installation script returned error exit status 1
  ErrorMessage: subprocess installed post-installation script returned error 
exit status 1
  HibernationDevice: RESUME=UUID=76e8643f-7435-425c-b483-fef4e2fa1918
  InstallationDate: Installed on 2011-10-25 (1175 days ago)
  InstallationMedia: Ubuntu 11.10 Oneiric Ocelot - Release amd64 (20111012)
  MachineType: System76, Inc. Bonobo Professional
  PackageArchitecture: all
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-28-generic 
root=UUID=94f7fc1e-fa27-4b24-99f3-4b461665a4a4 ro quiet splash
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No 
PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions: grub-pc 2.02~beta2-15
  RfKill:
   0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
  SourcePackage: linux
  Title: package linux-cloud-tools-common 3.16.0-29.39 failed to 
install/upgrade: subprocess installed post-installation script returned error 
exit status 1
  UpgradeStatus: Upgraded to utopic on 2014-11-03 (71 days ago)
  dmi.bios.date: 08/09/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.4
  dmi.board.asset.tag: Not Applicable
  dmi.board.name: Bonobo Professional
  dmi.board.vendor: System76, Inc.
  dmi.board.version: bonp5
  dmi.chassis.asset.tag: Not Applicable
  dmi.chassis.type: 10
  dmi.chassis.vendor: System76, Inc.
  dmi.chassis.version: bonp5
  dmi.modalias: 
dmi:bvnAmericanMegatrendsInc.:bvr4.6.4:bd08/09/2011:svnSystem76,Inc.:pnBonoboProfessional:pvrbonp5:rvnSystem76,Inc.:rnBonoboProfessional:rvrbonp5:cvnSystem76,Inc.:ct10:cvrbonp5:
  dmi.product.name: Bonobo Professional
  dmi.product.version: bonp5
  dmi.sys.vendor: System76, Inc.

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