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[Xen-users] Major corruption of Windows HVM disks - Xen 3.4

I've come back into work after the weekend and noticed that all (3) of our Windows HVMs have had massive issues with corruption of the hard disks. These have all been running rock solid on Xen 3.2.1 for the past 9 months or so but I upgraded their host to Xen 3.4 last week.

I noticed on Friday morning that all 3 had randomly rebooted on Thursday evening but tried not to think too much of it. Unfortunately as I say I have come in this morning and they are all in various states of disrepair.

One VM is claiming ntloader.exe is not on the disk (presumably with a number of other files), the other had crashed so I started it back up, it ran checkdsk before running through lots of corrupt and missing files, rebooting and is now BSODing on boot and the third boots but has an event log full of SQL Server errors talking about file corruption. As such I'm having to restore all three from backups which is not ideal.

Has anyone experienced anything similar to this? Is it likely to be a problem with qemu rather than Xen? Either way, I am left with no choice than to roll back to a previous version of Xen as I cannot risk this happening again.


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