zfs mirror recognizing disk failures

[Olivier Smedts]

2010/11/15 Michael Boers <michaelscotttech at gmail.com>:
> Is there anything I can do to make a zfs mirror quicker to give up on a
> flaky disk?
>
> I recently had a 100% zfs system crash when started to have some disk
> errors.  I had hoped that by having a mirror, the system would survive this
> type of error.  Instead it just hung.

You can offline the faulty drive.
Also, I think you're interested in a feature like TLER :
http://en.wikipedia.org/wiki/Time-Limited_Error_Recovery
But typical (cheap) drives don't implement it.

>
> Nov 11 10:05:01 caprica kernel: (da2:mpt0:0:3:0): SYNCHRONIZE CACHE(10).
> CDB: 35 0 0 0 0 0 0 0 0 0
> Nov 11 10:05:01 caprica kernel: (da2:mpt0:0:3:0): CAM Status: SCSI Status
> Error
> Nov 11 10:05:01 caprica kernel: (da2:mpt0:0:3:0): SCSI Status: Check
> Condition
> Nov 11 10:05:01 caprica kernel: (da2:mpt0:0:3:0): ABORTED COMMAND asc:0,0
> Nov 11 10:05:01 caprica kernel: (da2:mpt0:0:3:0): No additional sense
> information
> Nov 11 10:05:01 caprica kernel: (da2:mpt0:0:3:0): Retries Exhausted
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003c87a0:2838 timed
> out for ccb 0xffffff0103acc000 (req->ccb 0xffffff0103acc000)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003c5110:2839 timed
> out for ccb 0xffffff035cab0800 (req->ccb 0xffffff035cab0800)
> Nov 11 10:05:53 caprica kernel: mpt0: attempting to abort req
> 0xffffff80003c87a0:2838 function 0
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003bef30:2840 timed
> out for ccb 0xffffff0007986800 (req->ccb 0xffffff0007986800)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003c8560:2841 timed
> out for ccb 0xffffff032d985000 (req->ccb 0xffffff032d985000)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003bf320:2842 timed
> out for ccb 0xffffff0103af2000 (req->ccb 0xffffff0103af2000)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003cbda0:2843 timed
> out for ccb 0xffffff0103b0b000 (req->ccb 0xffffff0103b0b000)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003bfd40:2844 timed
> out for ccb 0xffffff00102bf800 (req->ccb 0xffffff00102bf800)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003cad50:2845 timed
> out for ccb 0xffffff01e6f33000 (req->ccb 0xffffff01e6f33000)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003caf00:2846 timed
> out for ccb 0xffffff01e6f24800 (req->ccb 0xffffff01e6f24800)
> Nov 11 10:05:53 caprica kernel: mpt0: request 0xffffff80003ccd60:2847 timed
> out for ccb 0xffffff01308a4000 (req->ccb 0xffffff01308a4000)
>
> Is this a type of error zfs can survive or do I need a hardware mirror to
> handle this type of problem?
>
> Thanks,
>
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-- 
Olivier Smedts                                                 _
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