Windows Server Backup failed to backup with error 0x81000101

Symptom:

Sometimes Windows Server Backup failed to backup the data. The error is:

The shared restore point operation failed with error (0x81000101) The creation of a shadow copy has timed out. Try this operation again.

In the event viewer, found the following error:

The backup operation that started at '‎**** has failed because the Volume Shadow Copy Service operation to create a shadow copy of the volumes being backed up failed with following error code '2155348001'. Please review the event details for a solution, and then rerun the backup operation once the issue is resolved.

Cause:

Windows Server Backup is timing out during shadow copy creation since it is taking more than 10 minutes.

Resolution:

- Run regedit.exe and navigate to "HKEY_LOCAL_MACHINESoftwareMicrosoftWindows NTCurrentVersionSPP"

- Create a new Registry value of type DWORD with name "CreateTimeout"

- Change value to 12000000(2*10*60*1000 = 20 mins) in decimal

More information:

http://blogs.technet.com/b/filecab/archive/2009/09/16/diagnosing-failures-in-windows-server-backup-part-1-vss-spp-errors.aspx