您好,
您可以参照这篇文章来进行排错。
Troubleshoot VSS issues that occur with Windows Server Backup (WBADMIN) in Windows Server 2008 and Windows Server 2008 R2
http://technet.microsoft.com/zh-CN/library/ee692290(v=ws.10).aspx
谢谢。
Jeremy Wu
TechNet Community Support