Description
The backup was unable to start due to VSS problems. Please refer to the backup log for more details.
Resolution
A detailed description of the problem is provided in the backup log. Please refer to the log for more details.
Also make sure that the Volume Shadow Copy Service is not disabled, and that no other 3rd party VSS providers are interfering with the backup.
ERROR - The shared restore point operation failed with error (0x81000101)
The creation of a shadow copy has timed out. Try again this operation.
If you receive the above error in your report, we have recently found a registry key which contains the timeout value set by Microsoft for VSS and found that you can edit this to extend it.
To get to the registry key, open Regedit (Start > Run > Regedit) and browse to
"HKLM\Software\\Microsoft\\Windows NT\\CurrentVersion\\SPP\\CreateTimeout".
Change value to 1200000 (2*10*60*1000 = 20 mins).
The default for the timeout period is 10 mins so hopefully doubling this will give enough time to complete the snapshot.
If this isn't present, you'll need to manually enter the registry key. It's a DWORD 32-bit key.
It's also been confirmed that the following hotfix resolves this VSS timeout error:
http://support.microsoft.com/default.aspx?scid=kb;en-us;956136&sd=rss&spid=11734