Dataprotector : Not a valid mount point => aborting.
I recently came across the following error when setting up a new DP backup for a Windows Server 2003 x64 R2 SP2 cluster:
Volume Shadow Copy functionality could not be initialized.
Fallback to legacy filesystem backup was not allowed. Aborting the backup.
Not a valid mount point => aborting.
I was also presented with the followingerror in the Application event log on the server:
Event Type: Error
Event Source: VSS
Event Category: None
Event ID: 11
Volume Shadow Copy Service information: The COM Server with CLSID {e579ab5f-1cc4-44b4-bed9-de0991ff0623} and name Coordinator cannot be started. [0x80070005]
On investigation I installed the KB940349 VSS update (http://support.microsoft.com/kb/940349), after rebooting each host, VSS backup functionality was restored.