When Volume Shadow Copy Service (VSS) performs a parallel backup operation on a computer that is running Windows Server 2003 Service Pack 2 (SP2), Windows Vista, or Windows Server 2008, the operation may fail. When this issue occurs, the VSS writers are in a “corrupted” state, and the VSS writers return the following error message:


For example, you may encounter this issue when you use System Center Data Protection Manager to perform a parallel backup operation.

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