When using System Center Virtual Machine Manager 2008 (SCVMM 2008), a Physical to Virtual (P2V) conversion of a Windows Server 2003 system fails due to the Volume Shadow Copy Service (VSS) on the P2V source machine. You will receive an error similar to the following:
VMM is unable to create a snapshot set on win2k3.contoso.com. An unexpected error occurred during the Volume Shadow Copy service operation.
(Unknown error (0x80042318))
Try the operation again.
Additionally, attempts to list the VSS writers on the P2V source computer produces no output. This test produces an error in the application event log with errors similar to the one below:
Event Type: Error
Event Source: VSS
Event ID: 12302
Description: Volume Shadow Copy Service error: An internal inconsistency was detected in trying to contact shadow copy service writers. Please check to see that the Event Service and Volume Shadow Copy Service are operating properly.
Note: To list the VSS writers from a command prompt run the following command:
vssadmin list writers
This can occur because a corrupted subscription is detected by the COM+ system causing it to stop processing further VSS providers. COM+ is essential to the Volume Shadow Copy Service.
A Hotfix is available that corrects this issue. This hotfix is already included in Service Pack 3 (SP3) for Windows Server 2003 and requires that Windows 2003 SP1 or SP2 is already installed. The hotfix is also available separately at the link below: