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[Xen-users] Win 2008 x86 / GPLPV on Xen 4.0.1 - BSOD whem migrating HVM

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Subject: [Xen-users] Win 2008 x86 / GPLPV on Xen 4.0.1 - BSOD whem migrating HVM to a new machine.
From: Adam Wilbraham <adam.wilbraham@xxxxxxxxxxxxxxxx>
Date: Tue, 31 Aug 2010 16:41:10 +0100
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I am encountering an issue on some HVMs I have just built, and I'm
wondering if its expected behaviour. I have a number of Windows 2008
HVM installs on Xen 4.0.1 (on top of Debian Lenny, kernel
2.6.32-bpo.5-xen-686) which use the latest GPLPV driver*. The
underlying disk subsystem is replicated with DRBD to help provide
disaster recovery. The issue I'm seeing is if I migrate (not live, a
shutdown and start clean) any of these domUs to the other node then I
will get a BSOD on boot. The only way to "cure" this BSOD is to boot
into safe mode, then do a restart of it when it will subsequently boot
fine. The error given within the BSOD tells me to run CHKDSK /F so I'm
wondering if its just because the underlying hardware has changed and
the virtual disk is exposing itself slightly differently between

Its not a server specific issue - it happens in both directions.
Unfortunately I'm not sure if it was happening before the GPLPV
drivers were installed - I pretty much put them on straight away after
the Windows setup.

There doesn't appear to be any data loss or serious side effects to
this BSOD, its just slightly annoying to have to boot each domU into
safe mode & restart again before its operational. I've seen some
problems with BSODs and migration of HVMs before, but this time I can
guarantee that it happens each time I migrate.

Anyone had any similar experiences?

* http://www.meadowcourt.org/downloads/gplpv_Vista2008x32_0.11.0.213.msi
is th eGPLPV driver I'm using.

Adam Wilbraham - Senior Systems Administrator
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