Re: Recovered disk error caused disk to go offline.

iSCSI acts as another HBA, and conveys status up from the [Fibre
Channel] devices to the scsi layer.  SCSI reported that event, and the
raid system rolled over the disk to another, more reliable, one.
Wouldn't that be correct behavior for Raid?  Cc-ing linux-raid...

On Fri, 30 Jan 2004, Guy verbalised:

Sorry about the re-post, but no comments after almost 2 days.

-----Original Message-----
From: <redacted>
[mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Guy
Sent: Thursday, January 29, 2004 12:21 AM
To: <redacted>
Subject: Recovered disk error caused disk to go offline.

Neil Brown said to send this message to linux-scsi, so here it is.

Please help.
Thanks,
Guy

On Thursday January 29, bugzilla@watkins-home.com wrote:

quoted

As you can see in the log, the write error recovered with auto

reallocation!

quoted

As I understand it, this is a normal event with today's disks.
I don't think the disk should have been considered failed.

Comments please?

You need to talk to linux-scsi about this.  The scsi subsystem told
the raid subsystem that there was an error, so the raid subsystem
stopped using the device.

If the write error was recovered, scsi shouldn't have reported an
error to raid.

NeilBrown

quoted

Thanks,
Guy

The spare disk resynced just fine..,A I never knew for over 24
hours!  This is cool stuff!

Jan 27 12:44:06 watkins kernel: SCSI disk error : host 2 channel 0
id 4

lun

quoted

0 return code = 8000002 Jan 27 12:44:06 watkins kernel: Info
fld=0x7e5c81, Deferred sd08:71: sense key Recovered Error Jan 27
12:44:06 watkins kernel: Additional sense indicates Write error -
recovered with auto reallocation Jan 27 12:44:06 watkins kernel:.,A
I/O error: dev 08:71, sector 8280704 Jan 27 12:44:06 watkins
kernel: raid5: Disk failure on sdh1, disabling device. Operation
continuing on 13 devices Jan 27 12:44:06 watkins kernel: md:
updating md2 RAID superblock on device Jan 27 12:44:06 watkins
kernel: md: sdc1 [events: 00000009]<6>(write)

sdc1's

quoted

sb offset: 17767744 Jan 27 12:44:06 watkins kernel: md: recovery
thread got woken up ...  Jan 27 12:44:06 watkins kernel: md2:
resyncing spare disk sdc1 to replace failed disk Jan 27 12:44:06
watkins kernel: RAID5 conf printout: Jan 27 12:44:06 watkins
kernel:.,A --- rd:14 wd:13 fd:1

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