** Changed in: linux (Ubuntu Zesty)
Status: In Progress => Fix Released
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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:
Fix Released
Status in linux source package in Trusty:
In Progress
Status in linux source package in Xenial:
Fix Committed
Status in linux source package in Yakkety:
Fix Committed
Status in linux source package in Zesty:
Fix Released
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 ffff88006eb6c700 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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