Re: 2.6.24.3: regular sata drive resets - worrisome?
From: Tejun Heo
Date: Mon Mar 31 2008 - 00:33:35 EST
Roger Heflin wrote:
The only non-failing drive was sdf as it was running in standby mode
in this md raid 5 ensemble:
20080323-011337-sdc.log:195 Hardware_ECC_Recovered 0x001a 100
100 000 Old_age Always - 162956700
20080323-011338-sde.log:195 Hardware_ECC_Recovered 0x001a 100
100 000 Old_age Always - 148429049
Hmmm... looks similar.
Hmmm... If the drive is failing FLUSHs, I would expect to see elevated
reallocation counters and maybe some pending counts. Aieee.. weird.
But there are no reallocations nor any pending sectors on any of them.
Yeah, indded.
It's been 4 samsung drives at all hanging on a sata sil 3124:
FLUSH_EXT timing out usually indicates that the drive is having
problem writing out what it has in its cache to the media. There was
one case where FLUSH_EXT timeout was caused by the driver failing to
switch controller back from NCQ mode before issuing FLUSH_EXT but that
was on sata_nv. There hasn't been any similar problem on sata_sil24.
Hmm, I didn't noticed any data distortions, and if there where, they
live on as copies in their new home..
It should have appeared as read errors. Maybe the drive successfully
^^^^
write (I guess)
I actually meant read. For the corrupted data to get transferred to
other disks, it should have been read as wrong values but such things
should never happen as ECC checks would fail.
wrote those sectors after 30+ secs timeout.
That would point to some driver issue, wouldn't it? Roger Heflin also
experienced similar behavior with that controller, which wasn't
reproducible with another.
Roger's problem is different one. I'll talk about it below.
I can offer to you rebuilding that md in a test environment, and
giving you access to it, if you're interested.
Can you hook up those failed drives to a different controller? Say,
ahci or ata_piix and put them under write load (ext3 w/ barrier=1 and
copying lots of files into it should work) and see whether the problem
reproduces?
Here are the errors I get, though look at it closer, I am don't appear
to be getting the reset, just this error from time to time:
sd 9:0:0:0: [sde] 976773168 512-byte hardware sectors (500108 MB)
sd 9:0:0:0: [sde] Write Protect is off
sd 9:0:0:0: [sde] Mode Sense: 00 3a 00 00
sd 9:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't
support DPO or FUA
ata8.00: exception Emask 0x0 SAct 0x0 SErr 0x280000 action 0x0
ata8.00: BMDMA2 stat 0x687d8009
ata8.00: cmd 25/00:80:a7:00:1d/00:01:1d:00:00/e0 tag 0 cdb 0x0 data
196608 in
res 51/04:8f:98:01:1d/00:00:1d:00:00/f0 Emask 0x1 (device error)
ata8.00: configured for UDMA/100
That's device abort error on read. The drive just can't read sector one
of the requested sectors and it's not sata_sil24. It's a bmdma one.
I have 4 identical disks, with all 4 connected to the SIL controller all
give some errors, moving 2 of the disks to a promise controller makes
the errors go away on the 2 connected to the promise controller. All
drives are part of a software raid5 array.
Ah.. okay, sata_sil. Roger, the moving and errors are not very likely
to have anything to do with each other. The only possibility is
transmission problems but the drive didn't report transport error (ICRC)
and it's more likely that the drive was experiencing temporary failures.
It's also possible that the drive set ABRT although there was some
problem with the transport tho.
If you move the drive back to the sata_sil, do those problems appear
again? Anyways, this doesn't really have anything to do with what Hans
is seeing.
Thanks.
--
tejun
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