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Re: xfs_repair of critical volume

To: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Subject: Re: xfs_repair of critical volume
From: Eli Morris <ermorris@xxxxxxxx>
Date: Sun, 31 Oct 2010 20:40:20 -0700
Cc: xfs@xxxxxxxxxxx
In-reply-to: <20101031214021.686f43b8@xxxxxxxxxxxxxx>
References: <C17C2CB6-A695-41B2-B12A-1CBF6DAD556F@xxxxxxxx> <20101031214021.686f43b8@xxxxxxxxxxxxxx>
On Oct 31, 2010, at 1:40 PM, Emmanuel Florac wrote:

> Le Sun, 31 Oct 2010 12:56:33 -0700 vous écriviez:
>> OK, that's a long tale of woe. Thanks for any advise. 
> oK, so what we'd like to do is get the backup RAID volume back in
> working order. You said it's made of 2TB Caviar green drives, but
> didn't mention the RAID controller type... As I understand it, you
> power-cycled the RAID array, so the cache is gone, whatever have been
> in it... 
> All arrays I know will happily reassemble a working RAID if you
> succesfully revive the failed drives.
> Logically the failed drives are almost certainly not really dead, but
> in a temporary failure state mode. First, you must check WD support and
> utilities to see if something may apply to your configuration. Anyway,
> checking the failed drives' health with the western digital disk
> utility should allow you to determine if they're toast or not.
> In the case they're not actually dead, you could try to revive the
> badblocks with Spinrite (www.grc.com), it saved my life a couple of
> times, however it's quite risky when used with SMART-tripped drives.
> -- 
> ------------------------------------------------------------------------
> Emmanuel Florac     |   Direction technique
>                    |   Intellique
>                    |  <eflorac@xxxxxxxxxxxxxx>
>                    |   +33 1 78 94 84 02
> ------------------------------------------------------------------------


Thanks for your help. The RAID is a SCSI connected direct attached storage 16 
bay unit made by Maxtronic. It is a Janus 6640, is case that helps anything. At 
the time of its problem, it was mounted read-only as I was trying to be careful 
of the data, since the main volume failed and this was our only copy. So maybe 
the cache isn't a big deal. I'll try the "dead" drives tomorrow with a WD 
utility. I'll give Spinrite a try, if the WD utility doesn't revive them.

thanks a lot for the help. I'll let you all know how things go.


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