Hi Everyone,
I've recently P2V'd two Dell servers running Server 2003 R2 to a Hyper-V 2012 box. The configuration of the each server is very similar, each one now having one virtualised disk containing 3 partitions - Dell Utility, Windows, Data. I do a daily backup of the Hyper-V host including the online VMs. One server backs up fine with no issues. However the other server gives me the following error at the beginning of the backup:
Log Name: Microsoft-Windows-Hyper-V-VMMS-Admin
Source: Microsoft-Windows-Hyper-V-VMMS
Date: 12/06/2013 20:02:52
Event ID: 10112
Task Category: None
Level: Error
Keywords:
User: SYSTEM
Computer: HYPERV01
Description:
The number of volumes reverted does not match the number of volumes in the snapshot set for virtual machine 'SAPServer' (Virtual machine ID C905ECC8-B247-42D7-B986-F5F97FD87B3B).
I don't see any event log errors in the guest vm at this time
I've searched for solutions and most refer to Server 2008 resolving the above with hotfixes, rollups etc. The only one that could possibly be applicable is maybe kb975695 which refers to a disk signature clash. (Sorry- can't post link until my account is verified!). I tried the resolution here but to no avail. I can also successfully mount the vhdx when the vm is offline with no issues.
As an interim measure I decided to do an in-vm backup to a passthough USB drive connect to the above problem vm.
The really curious part is the Hyper-V backup of the online VMs works OK and gives no error when the passthrough disk is attached. So obviously changing the drive configuration seems to do something.
Any ideas ???
Rgds,
Deisceart