Hyper-V running XP: unmountable_boot_volume

I have a windows XP virtual machine running on Win 2008 Hyper-V.
It has been running fine until today, after a reboot I get a Blue Screen:
unmountable_boot_volume
STOP:0x000000ED

This was a P2V machine about 6 months back, an I also remember having this problem back then.  But back then I just re-did the P2V and it fixed it.  I cannot do that now.

I have researched this error, and on a Physical system it is recommmended this I do a chkdsk from Recovery Console.
Is this recommended when it is a virtual machine?

Thanks.
ITIExperts1Asked:
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rindiCommented:
Yes, run chkdsk on the VM too, it might help. Has the VM crashed often, or was it not shut-down properly? Things like that will cause corruption of the file-system...
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ITIExperts1Author Commented:
Rindi,
the CHDSK in recovery console says the disk a corrupt but it does not run.
The VM has only crashed when I did the initial P2V, so I re-did the P2V and it worked (this was 6 months back)
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rindiCommented:
If chkdsk doesn't run from the recovery console the file-system is probably too corrupt to fix. You could try booting the VM suing something like paragon harddisk manager and trying to repair it from there, but don't have too high hopes. What you can also try is to run chkdsk on your host first, and then in the VM.

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ITIExperts1Author Commented:
Unable to repair the VHD.  had to recover from backup
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