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Re: xfs_force_shutdown after Raid crash

To: Steffen Knauf <Steffen.Knauf@xxxxxxxxxxxxxx>
Subject: Re: xfs_force_shutdown after Raid crash
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sat, 31 Jan 2009 05:57:12 -0500
Cc: xfs@xxxxxxxxxxx
In-reply-to: <498376CF.8020806@xxxxxxxxxxxxxx>
References: <498376CF.8020806@xxxxxxxxxxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Fri, Jan 30, 2009 at 10:53:19PM +0100, Steffen Knauf wrote:
> Hello,
>
> after a raid crash (Raid Controller problem, 3 Disks of the Disk Group  
> were kicked out oft the diskgroup), 2 of 3 partitions (XFS FS) were  
> shutdown immediately.
> Perhaps somebody has a idea, what's the best solution (xfs_repair?).

This looks like you were running with a write back cache enabled on the
controller / disks but without barriers.  xfs_repair should be able
to repair the filesystem.  If you're lucky only the freespace-btrees
are corrupted (as in the trace below) as xfs_repair can rebuild them
from scratch. 

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