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Re: xfs_force_shutdown after Raid crash

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: xfs_force_shutdown after Raid crash
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 3 Feb 2009 10:49:08 -0500
Cc: xfs@xxxxxxxxxxx
In-reply-to: <200902031140.08576@xxxxxx>
References: <498376CF.8020806@xxxxxxxxxxxxxx> <200902031022.38583@xxxxxx> <20090203093239.GA14963@xxxxxxxxxxxxx> <200902031140.08576@xxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Tue, Feb 03, 2009 at 11:40:08AM +0100, Michael Monnerie wrote:
> On Dienstag 03 Februar 2009 Christoph Hellwig wrote:
> > Yes. ?I would hope raid controllers disable the write cache on disks,
> > but for lower end controllers I'm not sure they really do it.
> 
> On Areca Controllers, I can select if I want it on or off. Could an 
> information about the disk cache be written to the FAQ? Would for sure 
> save some people's data... :-)
> 
> So battery backed controller cache on, disk cache off, barriers off.
> Quite simple once you know it :-))

Yeah, that sounds correct.  Do you volunteer for the FAQ entry?  xfs.org
is a wiki so you could add it.  I'm happy to proof-read it if you want.

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