Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread Wolfgang S. Rupprecht

D. Hugh Redelmeier h...@mimosa.com writes:
 Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200...@gmail.com:
 After running flawlessly for 6+ months I just had my Seagate
 ST31500343AS (w. SD35 firmware) flake out.

 And so it goes.  I infer that this cycle goes on until the power is
 turned off.

Yes, the system gets progressively wonkier until it is rebooted.  At
some point the drive just locks up hard and linux is dead in the water.

The funny part is that I can't find anything on Seagate's site admitting
to a problem with the version of the drive that I have.  There was some
other guy with the same model and same firmware that also noticed the
drive locking up once in a while.  Mine does it within 6 hours of me
streaming data to the drive.  Seems that the data direction is very
important.  It needs to be a write of several 1GB files for my system to
lock up.

At this point, I'd be happy to just turn off whatever feature is
triggering the drives firmware bug.  I'd turn off NCQ from the linux end
if there were any documentation on how to do it.

-wolfgang
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Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread Gene Heskett
On Monday 11 May 2009, Wolfgang S. Rupprecht wrote:
D. Hugh Redelmeier h...@mimosa.com writes:
 Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200...@gmail.com:
 After running flawlessly for 6+ months I just had my Seagate
 ST31500343AS (w. SD35 firmware) flake out.

 And so it goes.  I infer that this cycle goes on until the power is
 turned off.

Yes, the system gets progressively wonkier until it is rebooted.  At
some point the drive just locks up hard and linux is dead in the water.

The funny part is that I can't find anything on Seagate's site admitting
to a problem with the version of the drive that I have.  There was some
other guy with the same model and same firmware that also noticed the
drive locking up once in a while.  Mine does it within 6 hours of me
streaming data to the drive.  Seems that the data direction is very
important.  It needs to be a write of several 1GB files for my system to
lock up.

At this point, I'd be happy to just turn off whatever feature is
triggering the drives firmware bug.  I'd turn off NCQ from the linux end
if there were any documentation on how to do it.

-wolfgang
--
Wolfgang S. Rupprecht  http://www.full-steam.org/  (ipv6-only)
 You may need to config 6to4 to see the above pages.

Seagate has a downloadable cd image that when burnt and run as a boot disk 
will survey the system and update any of their disks that need it.  No data 
loss was encountered when I did one of mine.

-- 
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 soap, ballot, jury, and ammo. Please use in that order.
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Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread D. Hugh Redelmeier
| From: Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200...@gmail.com

| D. Hugh Redelmeier h...@mimosa.com writes:
|  Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200...@gmail.com:
|  After running flawlessly for 6+ months I just had my Seagate
|  ST31500343AS (w. SD35 firmware) flake out.
| 
|  And so it goes.  I infer that this cycle goes on until the power is
|  turned off.
| 
| Yes, the system gets progressively wonkier until it is rebooted.  At
| some point the drive just locks up hard and linux is dead in the water.

Ahh.  I had not noticed that your system got the disk working between
episodes.  I should have inferred this from the timestamps.

| The funny part is that I can't find anything on Seagate's site admitting
| to a problem with the version of the drive that I have.

I infer that Seagate generally doesn't disclose problems or even
fixes.  You have to report a problem to support, and perhaps even ask
explicitly for a firmware update to be offered one.

Note: messages on the Seagate forum are for user to user communication
and support people apparently never read them!  There are Seagate
moderators but they are not technical and are not support.

The one exception is the particular firmware update that prevents the
bricking of 7200.11 drives.  They announced that fix and made the
firmware available for download.  My guess is that they released it
because the recovery from bricking is painful to Seagate: once it
happens, any normal user must RMA the drive.

I, for example, asked for and got a firmware update in mid January to
fix a performance problem with my ST31500343AS.  This firmware was not
announced, but I asked for it because I knew it existed.  This was
just before the bricking problem was announced.  The firmware I got
was not the unbricking firmware.

There is much confusion on the Seagate forum.  Many users think that
the released firmware is supposed the fix their particular problem.
In fact, it was released to fix one particular bug.  It might happen
to fix other bugs (because it was based on later firmware than their
drive came with), but that was not the point.

Seagate has leaked, but not announced, details of the bug fixed by
that firmware.  Amazingly, some users have figured out how to revive
a bricked drive using a serial diagnostic console.
  http://www.msfn.org/board/index.php?showtopic=128807

If you have a lot of time on your hands, it might be interesting to
see what the serial diagnostic console has to say when your drive is
misbehaving.

|  There was some
| other guy with the same model and same firmware that also noticed the
| drive locking up once in a while.  Mine does it within 6 hours of me
| streaming data to the drive.  Seems that the data direction is very
| important.  It needs to be a write of several 1GB files for my system to
| lock up.

Do report this to Seagate support.  They might have a fix.

Do report this on the Seagate Forum (or somewhere else that you think
more suitable).  If you do, post that fact in this thread so other
interested folks can find it.

If you can reliably reproduce this problem, that in itself is very
interesting.  The reports on the Seagate forum have not been very
useful.

I'm very interested because I have two of these drives (with CC1J and
SD1A firmware) and they are mostly shelved because of the fear I have
of their reliability.  I'm playing with one in a MythTV box.  I'd like
to be able to use a recipe to see if I can drive my disks into bad
behaviour.

| At this point, I'd be happy to just turn off whatever feature is
| triggering the drives firmware bug.  I'd turn off NCQ from the linux end
| if there were any documentation on how to do it.

You didn't explain why you thought that the problem is related to NCQ.
Have you seen reports of NCQ problems?

This FAQ claims to tell you how to turn off NCQ:
  http://linux-ata.org/faq.html

Do consider doing a S.M.A.R.T. scan of the drive.  I've found that
bad blocks can do odd things to disk behaviour.

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Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread Wolfgang S. Rupprecht

Gene Heskett gene.hesk...@verizon.net writes:
 Seagate has a downloadable cd image that when burnt and run as a boot disk 
 will survey the system and update any of their disks that need it.  No data 
 loss was encountered when I did one of mine.

I couldn't find any that applied to my disk.  They have 3 consecutive
model numbers for what is essentially the same 1.5TB drive.  They only
admit to firmware issues with the first two model numbers.  I supposed,
once they start using a 4th model number, they might admit to problems
with mine too. ;-)

-wolfgang
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 You may need to config 6to4 to see the above pages.

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Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread Wolfgang S. Rupprecht

D. Hugh Redelmeier h...@mimosa.com writes:
 I infer that Seagate generally doesn't disclose problems or even
 fixes.  You have to report a problem to support, and perhaps even ask
 explicitly for a firmware update to be offered one.

Thanks.  I'll see if I can find a way to report this to seagate.  They
don't seem to make it very easy by not having a prominent support@
address that I can find documented anywhere.

Their web page had some convoluted sign up to get a seagate approved
identity.  The sign up refused me enough times that I just figured it
was broken.

 If you can reliably reproduce this problem, that in itself is very
 interesting.  The reports on the Seagate forum have not been very
 useful.

Well, the test case that works for me is to copy a half dozen 1GB files
from a sata dvd reader to the sata seagate disk.

It might be very kernel dependent though.  I hadn't seen the disk act up
before a few weeks ago.  It also takes hours for the system to wedge up
solidly.  This isn't going to be a fun bug for Seagate to find.

 You didn't explain why you thought that the problem is related to NCQ.
 Have you seen reports of NCQ problems?

I don't know that it is NCQ related, only that other reports of similar
lockups under streaming conditions claimed it was related to a known
Seagate bug related to their NCQ implementation.  I might be
misremembering or misunderstanding though...

 This FAQ claims to tell you how to turn off NCQ:
   http://linux-ata.org/faq.html

Thanks!  Will try that and see if the problem goes away.

 Do consider doing a S.M.A.R.T. scan of the drive.  I've found that
 bad blocks can do odd things to disk behaviour.

I do a nightly long test.  No grown errors and no pending errors.

-wolfgang
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 You may need to config 6to4 to see the above pages.

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Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread D. Hugh Redelmeier
| From: Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200...@gmail.com
| D. Hugh Redelmeier h...@mimosa.com writes:

|   I'll see if I can find a way to report this to seagate.  They
| don't seem to make it very easy by not having a prominent support@
| address that I can find documented anywhere.

Folks on the forum whine a lot about Seagate support.  I've had mixed
but mostly poor results.

Phone support sometimes has long hold or queue times.

email support is really a web form.

I've had OK results with their online chat support.

In any case, if the frontline folks know the answer, you'll probably
get it.  I have had no luck getting beyond them.  But I've only tried
a little bit.

If you can get a problem that others can duplicate, and you post it on
the forum, perhaps that will get their attention.

| Their web page had some convoluted sign up to get a seagate approved
| identity.  The sign up refused me enough times that I just figured it
| was broken.

Their forum software is as bad as I've seen.

| Well, the test case that works for me is to copy a half dozen 1GB files
| from a sata dvd reader to the sata seagate disk.
| 
| It might be very kernel dependent though.  I hadn't seen the disk act up
| before a few weeks ago.  It also takes hours for the system to wedge up
| solidly.  This isn't going to be a fun bug for Seagate to find.

Could you dd an equivallent volume from /dev/zero to see if it also
causes a problem?  That eliminates one more variable from the problem.

| I don't know that it is NCQ related, only that other reports of similar
| lockups under streaming conditions claimed it was related to a known
| Seagate bug related to their NCQ implementation.  I might be
| misremembering or misunderstanding though...

Why do you call it streaming conditions?  Do you think that the fact
that the DVD delivers bytes more slowly than the hard drive would accept
them is important?  Or is there some other aspect that you think is
relevant?

NCQ has been around long enough that I'd expect/hope that the nits
have been picked.  Of course I could be wrong.

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Re: Seagate disk problems (NCQ bug???)

2009-05-11 Thread Wolfgang S. Rupprecht

D. Hugh Redelmeier h...@mimosa.com writes:
 Could you dd an equivallent volume from /dev/zero to see if it also
 causes a problem?  That eliminates one more variable from the problem.

I'll try.  I have only seen it happen with a dvd as source.  Disk to
disk copies such as cp -ax / /mnt/backup didn't seem to cause
problems.

 Why do you call it streaming conditions?  Do you think that the fact
 that the DVD delivers bytes more slowly than the hard drive would accept
 them is important?  

I had assumed that the bug required a high sustained data rate that
would dump a large number of consecutive blocks into the disk's on-disk
cache, but was still slow enough to allow the on-disk cache to drain.

But then again, it was just a stab at explaining why it only seemed to
happen when reading from dvd.

 Or is there some other aspect that you think is relevant?

Hard to say.  I'd only really had 3 or 4 lockups and each time it was
the morning after I'd added a new video.

 NCQ has been around long enough that I'd expect/hope that the nits
 have been picked.  Of course I could be wrong.

Well, I've seen the bug described as a on-disk cache flushing bug and/or
NCQ bug.

In any case, Seagate support got me some SD3B firmware to load onto the
disk.  Strangely my disk now identifies itself as ST31500341AS instead
of ST31500343AS (with a 1 instead of a 3).  That also explains why I
couldn't find other folks with bug reports -- only a few drives went out
with the trailing 3 model number.  Lets see how the drive holds up.
I'm beating on it right now.

-wolfgang
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 You may need to config 6to4 to see the above pages.

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Re: Seagate disk problems (NCQ bug???)

2009-05-10 Thread D. Hugh Redelmeier

| Date: Tue, 28 Apr 2009 17:59:50 -0700

Sorry for such a slow reply.

| From: Dave Stevens g...@uniserve.com
| Subject: Re: Seagate disk problems (NCQ bug???)
| 
| Quoting Wolfgang S. Rupprecht wolfgang.rupprecht+gnus200...@gmail.com:
| 
| 
| After running flawlessly for 6+ months I just had my Seagate
| ST31500343AS (w. SD35 firmware) flake out.  Does this look like the NCQ
| bug or just a random event?  The final error msg was around the time the
| machine hung hard.
| 
| There is a specific test you can download from Seagate and burn to a bootable
| cd. The test on the cd will tell you if it is the ncq bug. They are offering
| data recovery if it is indeed a blown disk, they're treating it as a warranty
| issue.

Can you give us a pointer to official and unofficial information about
the NCQ bug?

Seagate had a bug in firmware for 7200.11 drives.  They publically
disclosed a bit about the problem and offered a firmware upgrade near
the end of January 2007.  If the bug tripped, the drive would locked
up and could not be fixed in place.  See
  
http://forums.seagate.com/stx/board/message?board.id=ata_drivesthread.id=11972view=by_date_ascendingpage=1

That firmware fix has left a lot of complaining users.  That forum
thread has 794 messages currently!  I've read all of them and cannot
really see a pattern for the remaining problems.

I started this thread to try to get more coherent reports but it
hasn't worked.
  
http://forums.seagate.com/stx/board/message?board.id=ata_drivesthread.id=11184

A number of reports appear to be cases of drives going offline for
no reported reason.  One symptom is drives falling our of RAID arrays.
These drives come back after a power cycle.

Perhaps your problem is like this one.  And I have no idea if NCQ is
implicated.  But once your drive gets in a bad state, the driver tries
a reset and still isn't happy.  I'd be surprised if NCQ is used
between the reset and the subsequent failure

| Apr 28 04:26:29 arbol kernel: ata1: SATA max UDMA/133 irq_stat 0x0040,
| PHY RDY changed irq 22
| Apr 28 04:26:29 arbol kernel: ata1: softreset failed (device not ready)
| Apr 28 04:26:29 arbol kernel: ata1: failed due to HW bug, retry pmp=0
| Apr 28 04:26:29 arbol kernel: ata1: SATA link up 3.0 Gbps (SStatus 123
| SControl 300)
| Apr 28 04:26:29 arbol kernel: ata1.00: ATA-8: ST31500343AS, SD35, max
| UDMA/133
| Apr 28 04:26:29 arbol kernel: ata1.00: 2930277168 sectors, multi 16: LBA48
| NCQ (depth 31/32)
| Apr 28 04:26:29 arbol kernel: ata1.00: configured for UDMA/133

Time passes.  Happily, I assume.

| Apr 28 06:17:02 arbol kernel: ata1.00: exception Emask 0x50 SAct 0x1 SErr
| 0x90a02 action 0xe frozen
| Apr 28 06:17:02 arbol kernel: ata1.00: irq_stat 0x0040, PHY RDY changed
| Apr 28 06:17:02 arbol kernel: ata1: SError: { RecovComm Persist HostInt
| PHYRdyChg 10B8B }
| Apr 28 06:17:02 arbol kernel: ata1.00: cmd
| 60/08:00:e1:81:24/00:00:74:00:00/40 tag 0 ncq 4096 in
| Apr 28 06:17:02 arbol kernel: res 40/00:00:e1:81:24/00:00:74:00:00/40
| Emask 0x50 (ATA bus error)
| Apr 28 06:17:02 arbol kernel: ata1.00: status: { DRDY }

Something has gone wrong (duh!), but I don't know enough to say what.

| Apr 28 06:17:02 arbol kernel: ata1: hard resetting link

Here's a reset.  I bet NCQ will not be used for a while (until drive
appears to be up again after the reset).

| Apr 28 06:17:04 arbol kernel: ata1: SATA link up 3.0 Gbps (SStatus 123
| SControl 300)
| Apr 28 06:17:09 arbol kernel: ata1.00: qc timeout (cmd 0xec)
| Apr 28 06:17:09 arbol kernel: ata1.00: failed to IDENTIFY (I/O error,
| err_mask=0x4)

IDENTIFY is a command that asks the drive about its characteristics.
I would be astonished if a driver would be using NCQ at this point.

| Apr 28 06:17:09 arbol kernel: ata1.00: revalidation failed (errno=-5)
| Apr 28 06:17:09 arbol kernel: ata1: hard resetting link

Another reset.

| Apr 28 06:17:11 arbol kernel: ata1: SATA link up 3.0 Gbps (SStatus 123
| SControl 300)
| Apr 28 06:17:21 arbol kernel: ata1.00: qc timeout (cmd 0xec)
| Apr 28 06:17:21 arbol kernel: ata1.00: failed to IDENTIFY (I/O error,
| err_mask=0x4)

Another failure.  Again, I would not expect NCQ to be used at this
point.

And so it goes.  I infer that this cycle goes on until the power is
turned off.

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Re: Seagate disk problems (NCQ bug???)

2009-04-29 Thread Robin Laing

Wolfgang S. Rupprecht wrote:

After running flawlessly for 6+ months I just had my Seagate
ST31500343AS (w. SD35 firmware) flake out.  Does this look like the NCQ
bug or just a random event?  The final error msg was around the time the
machine hung hard.




Apr 28 06:41:26 arbol kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x90200 
action 0xe frozen
Apr 28 06:41:26 arbol kernel: ata1: irq_stat 0x0040, PHY RDY changed
Apr 28 06:41:26 arbol kernel: ata1: SError: { Persist PHYRdyChg 10B8B }
Apr 28 06:41:26 arbol kernel: ata1: hard resetting link
Apr 28 06:41:28 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:41:33 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:41:33 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:41:33 arbol kernel: ata1.00: revalidation failed (errno=-5)
Apr 28 06:41:33 arbol kernel: ata1: hard resetting link
Apr 28 06:41:34 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:41:44 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:41:44 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:41:44 arbol kernel: ata1.00: revalidation failed (errno=-5)
Apr 28 06:41:44 arbol kernel: ata1: hard resetting link
Apr 28 06:41:46 arbol kernel: ata1: softreset failed (device not ready)
Apr 28 06:41:46 arbol kernel: ata1: failed due to HW bug, retry pmp=0
Apr 28 06:41:46 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:41:46 arbol kernel: ata1.00: configured for UDMA/133
Apr 28 06:41:46 arbol kernel: ata1: EH complete
Apr 28 06:41:46 arbol kernel: sd 0:0:0:0: [sda] 2930277168 512-byte hardware 
sectors (1500302 MB)
Apr 28 06:41:46 arbol kernel: sd 0:0:0:0: [sda] Write Protect is off
Apr 28 06:41:46 arbol kernel: sd 0:0:0:0: [sda] Write cache: enabled, read 
cache: enabled, doesn't support DPO or FUA


-wolfgang


I had errors like this when my system load got to high for my system to 
work with.  I later found out that the motherboard controller was to 
slow.  It is an older system.  Replaced the controllers with SATA cards 
and no errors since.


I could predict when the errors were going to occur and almost predict 
when the system would lock up using uptime.


What controller chip is used in your system?


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Seagate disk problems (NCQ bug???)

2009-04-28 Thread Wolfgang S. Rupprecht

After running flawlessly for 6+ months I just had my Seagate
ST31500343AS (w. SD35 firmware) flake out.  Does this look like the NCQ
bug or just a random event?  The final error msg was around the time the
machine hung hard.


Apr 28 04:26:29 arbol kernel: ata1: SATA max UDMA/133 irq_stat 0x0040, PHY 
RDY changed irq 22
Apr 28 04:26:29 arbol kernel: ata1: softreset failed (device not ready)
Apr 28 04:26:29 arbol kernel: ata1: failed due to HW bug, retry pmp=0
Apr 28 04:26:29 arbol kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 
300)
Apr 28 04:26:29 arbol kernel: ata1.00: ATA-8: ST31500343AS, SD35, max UDMA/133
Apr 28 04:26:29 arbol kernel: ata1.00: 2930277168 sectors, multi 16: LBA48 NCQ 
(depth 31/32)
Apr 28 04:26:29 arbol kernel: ata1.00: configured for UDMA/133


Apr 28 06:17:02 arbol kernel: ata1.00: exception Emask 0x50 SAct 0x1 SErr 
0x90a02 action 0xe frozen
Apr 28 06:17:02 arbol kernel: ata1.00: irq_stat 0x0040, PHY RDY changed
Apr 28 06:17:02 arbol kernel: ata1: SError: { RecovComm Persist HostInt 
PHYRdyChg 10B8B }
Apr 28 06:17:02 arbol kernel: ata1.00: cmd 60/08:00:e1:81:24/00:00:74:00:00/40 
tag 0 ncq 4096 in
Apr 28 06:17:02 arbol kernel: res 40/00:00:e1:81:24/00:00:74:00:00/40 
Emask 0x50 (ATA bus error)
Apr 28 06:17:02 arbol kernel: ata1.00: status: { DRDY }
Apr 28 06:17:02 arbol kernel: ata1: hard resetting link
Apr 28 06:17:04 arbol kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 
300)
Apr 28 06:17:09 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:17:09 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:17:09 arbol kernel: ata1.00: revalidation failed (errno=-5)
Apr 28 06:17:09 arbol kernel: ata1: hard resetting link
Apr 28 06:17:11 arbol kernel: ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 
300)
Apr 28 06:17:21 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:17:21 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:17:21 arbol kernel: ata1.00: revalidation failed (errno=-5)
Apr 28 06:17:21 arbol kernel: ata1: limiting SATA link speed to 1.5 Gbps
Apr 28 06:17:21 arbol kernel: ata1: hard resetting link
Apr 28 06:17:22 arbol kernel: ata1: softreset failed (device not ready)
Apr 28 06:17:22 arbol kernel: ata1: failed due to HW bug, retry pmp=0
Apr 28 06:17:22 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:17:22 arbol kernel: ata1.00: configured for UDMA/133
Apr 28 06:17:22 arbol kernel: ata1: EH complete
Apr 28 06:17:22 arbol kernel: sd 0:0:0:0: [sda] 2930277168 512-byte hardware 
sectors (1500302 MB)
Apr 28 06:17:22 arbol kernel: sd 0:0:0:0: [sda] Write Protect is off
Apr 28 06:17:22 arbol kernel: sd 0:0:0:0: [sda] Write cache: enabled, read 
cache: enabled, doesn't support DPO or FUA


Apr 28 06:24:03 arbol kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x90200 
action 0xe frozen
Apr 28 06:24:03 arbol kernel: ata1: irq_stat 0x0040, PHY RDY changed
Apr 28 06:24:03 arbol kernel: ata1: SError: { Persist PHYRdyChg 10B8B }
Apr 28 06:24:03 arbol kernel: ata1: hard resetting link
Apr 28 06:24:05 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:24:10 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:24:10 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:24:10 arbol kernel: ata1.00: revalidation failed (errno=-5)
Apr 28 06:24:10 arbol kernel: ata1: hard resetting link
Apr 28 06:24:12 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:24:22 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:24:22 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:24:22 arbol kernel: ata1.00: revalidation failed (errno=-5)
Apr 28 06:24:22 arbol kernel: ata1: hard resetting link
Apr 28 06:24:23 arbol kernel: ata1: softreset failed (device not ready)
Apr 28 06:24:23 arbol kernel: ata1: failed due to HW bug, retry pmp=0
Apr 28 06:24:23 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:24:24 arbol kernel: ata1.00: configured for UDMA/133
Apr 28 06:24:24 arbol kernel: ata1: EH complete
Apr 28 06:24:24 arbol kernel: sd 0:0:0:0: [sda] 2930277168 512-byte hardware 
sectors (1500302 MB)
Apr 28 06:24:24 arbol kernel: sd 0:0:0:0: [sda] Write Protect is off
Apr 28 06:24:24 arbol kernel: sd 0:0:0:0: [sda] Write cache: enabled, read 
cache: enabled, doesn't support DPO or FUA


Apr 28 06:41:26 arbol kernel: ata1: exception Emask 0x10 SAct 0x0 SErr 0x90200 
action 0xe frozen
Apr 28 06:41:26 arbol kernel: ata1: irq_stat 0x0040, PHY RDY changed
Apr 28 06:41:26 arbol kernel: ata1: SError: { Persist PHYRdyChg 10B8B }
Apr 28 06:41:26 arbol kernel: ata1: hard resetting link
Apr 28 06:41:28 arbol kernel: ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 
310)
Apr 28 06:41:33 arbol kernel: ata1.00: qc timeout (cmd 0xec)
Apr 28 06:41:33 arbol kernel: ata1.00: failed to IDENTIFY (I/O error, 
err_mask=0x4)
Apr 28 06:41:33 arbol kernel: