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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: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Wed, 4 Feb 2009 23:26:25 +1100
Cc: xfs@xxxxxxxxxxx
In-reply-to: <200902041127.46714@xxxxxx>
Mail-followup-to: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <498376CF.8020806@xxxxxxxxxxxxxx> <20090203154907.GA21278@xxxxxxxxxxxxx> <200902040952.45440@xxxxxx> <200902041127.46714@xxxxxx>
User-agent: Mutt/1.5.18 (2008-05-17)
On Wed, Feb 04, 2009 at 11:27:46AM +0100, Michael Monnerie wrote:
> On Mittwoch 04 Februar 2009 Michael Monnerie wrote:
> > == Q. What about the hard disk write cache? ==
> 
> What just comes to my mind: what about XEN/VMware?
> 
> What settings should be used within a virtual machine? Even if I have 
> battery backed cache and nobarrier on the host, the VM itself could 
> crash, or the whole host freeze. Is "nobarrier" save within a VM?

Depends on the implementation of the hypervisor.

Cheers,

Dave.
-- 
Dave Chinner
david@xxxxxxxxxxxxx

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