Here is an option to find out how much of a backup tape was used in DPM 2007.
1. Select Recovery tab and select Browse button in the left pane
2. Expand each protected server and select protected data
3. In the middle pane, right click on the protected and select Show all Recovery Points
4. You will see the data size information there.
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About Santhosh Sivarajan
Santhosh Sivarajan is a Technical Architect in Houston, TX. His main focuses are Microsoft Infrastructure and Security Technologies. He is MCTS, MCSE (W2K3/W2K/NT4), MCP+I, MCSA (W2K3/W2K/MSG) and CCNA certified. His expertise includes Active Directory, Exchange, Migrations, Microsoft Clustering, Microsoft Security, RMS, MOM, LCS, ISA Server, etc. If you wish to send an email, he can be reached at santhosh@sivarajan.com. Blogs: http://santhoshsivarajan.blogspot.com/