From owner-freebsd-hackers@FreeBSD.ORG  Thu Mar 29 15:57:08 2012
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From: Hans Petter Selasky <hselasky@c2i.net>
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Cc: freebsd-questions@freebsd.org, Adrian Chadd <adrian@freebsd.org>,
	Mark Felder <feld@feld.me>, Joe Greco <jgreco@ns.sol.net>
Subject: Re: Please help me diagnose this crazy VMWare/FreeBSD 8.x crash
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On Thursday 29 March 2012 17:49:30 Joe Greco wrote:
> > On Thursday 29 March 2012 15:42:42 Joe Greco wrote:
> > > > Hi,
> > 
> > Do both 32- and 64-bit versions of FreeBSD crash?
> 
> We've only seen it happen on one virtual machine.  That was a 32-bit
> version.  And it's not so much a crash as it is a "disk I/O hang".

It almost sounds like the lost interrupt issue I've seen with USB EHCI 
devices, though disk I/O should have a retry timeout?

What does "wmstat -i" output?

--HPS