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Date: Wed, 20 Oct 2010 11:54:46 +0200
From: Emmanuel Florac <eflorac@intellique.com>
Subject: Re: Interesting possible XFS crash condition
Message-ID: <20101020115446.5d606b44@harpe.intellique.com>
In-Reply-To: <4CBE887F.6020506@dolphinlogic.com>
References: <4CBE887F.6020506@dolphinlogic.com>
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To: Shawn Usry <shawn@dolphinlogic.com>
Cc: xfs@oss.sgi.com

Le Wed, 20 Oct 2010 01:13:19 -0500
Shawn Usry <shawn@dolphinlogic.com> =E9crivait:

> The latter statement and observations lead me to believe that perhaps =

> this was simply a yucky controller that was failing under heavy
> I/O.   =


I've set up quite a lot of those RAID cards (about 100) and there is a
significant failure rate on these (much higher than the newer 9650). I
had both cases of bad controller RAM and CPU overheating several times.

Try unmounting the filesystem and start a RAID verify:

tw_cli /cX/uY start verify

This will generate high IO. Check dmesg for controller errors. Try
remounting after a couple of hours of verification. If the controller
is fried, it most probably fail, but shouldn't crash the system.

-- =

------------------------------------------------------------------------
Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |	<eflorac@intellique.com>
                    |   +33 1 78 94 84 02
------------------------------------------------------------------------

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