Dataprotector : Not a valid mount point => aborting.

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.