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Re: xfs_repair of critical volume

To: Eli Morris <ermorris@xxxxxxxx>
Subject: Re: xfs_repair of critical volume
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Sun, 31 Oct 2010 15:10:00 +0100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <75C248E3-2C99-426E-AE7D-9EC543726796@xxxxxxxx>
Organization: Intellique
References: <75C248E3-2C99-426E-AE7D-9EC543726796@xxxxxxxx>
Le Sun, 31 Oct 2010 00:54:13 -0700 vous écriviez:

> I have a large XFS filesystem (60 TB) that is composed of 5 hardware
> RAID 6 volumes. One of those volumes had several drives fail in a
> very short time and we lost that volume.

You may still have a slight chance to repair the broken RAID volume.
What is the type and model of RAID controller? What is the model of the
drives? Did you aggregate the RAID arrays with LVM?

Most drives failures (particularly on late 2009 Seagate SATA drives) are
both relatively frequent and transitory, i. e. may randomly recover
after a while.

What did you try? Can you power down the faulty RAID array
entirely and power it up after a while? Did you try to actually freeze
the failed drives (it may revive them for a while)? Did you try to run
SpinRite or another utility on the broken drives, individually ?

Emmanuel Florac     |   Direction technique
                    |   Intellique
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