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2008 R2 VM crashes after converting is disk from a VHDx to a VHD format - Hyper-V 2012

Posted on 2013-10-27
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Last Modified: 2014-11-12
Hi,

I've ran into a problem where I want to convert a virtual MS 2008 R2 DC (which is running on a 2012 HV host) from the VHDX disk format to a VHD format; the VM was created with a VHDX disk and this might be the problem?

The GUI convert process appears to complete and the .VHD is created but when I link it up to the VM and attempt to boot I get errors C00002E2 and 0xC000001, I've not tried the PowerShell convert process yet but I'd expect the same result.

WHY am I doing this:  I'm using Altaro for backing up and it refused to backup this 2008 VM with an error stating it can't find the .VHD files - I guess this is because the VM was created with VHDX disks and not VHD. (opps)

I could always rebuild but I'd like to know why and if anyone else has come across this.  

I'm experienced but not so much with Hyper-V, so I wonder if I'm missing something.

Many Thanks.

TC
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Question by:TopCat-007
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LVL 18

Expert Comment

by:Netflo
ID: 39604147
Are you using Altaro 3.5 and above which supports Server 2012 and VHDX? You may want to get the latest build installed and if there still is a problem to get support from them.
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Author Comment

by:TopCat-007
ID: 39604990
yes it was only downloaded and installed on Thursday after trials in a lab.
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LVL 18

Expert Comment

by:Netflo
ID: 39605191
Can you perform a Windows backup of the host and VMs? Does it complete successfully?

Alternatively if this problem is with Altaro, they do offer the following troubleshooter which you can prepare before raising a case with them: http://www.altaro.com/hv-troubleshooter.php
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Accepted Solution

by:
TopCat-007 earned 0 total points
ID: 39639774
The 2008 R2 VM still crashes after I convert its virtual disk format from a VHDx to a VHD, using the wizard but the Altaro backup problem (which I thought was directly related)... was fixed by MS KB Article Number(s): 970770.  Great tech support from Altaro!

So the two problems were not related and changing from VHDx back to VHD is no longer a concern.

Thanks.

TC
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Author Closing Comment

by:TopCat-007
ID: 39653040
fixed with the aid of Altaro support.
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