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Microsoft DPM 2010 Problems

usmanshaikh used Ask the Experts™
I am facing some problems with Microsoft DPM 2010. I wish if someone could help me resolving all those issues:

1. I have 3 protection groups created with colocation enabled in my DPM 2010. I am taking daily and weekly backups on both tape and the disk. Somehow I cannot erase the tapes and the tape utilization is growing every week as DPM is not allowing me to delete the tapes due to being used by the protection groups. I found many scripts on internet but I am confused which one to use to delete the tapes before the next backup.

2. I want to understand correct backup strategy for daily and weekly backups with the recovery points.

Thank you.
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This link might provide you with some good information on the limitations of DPM when using tapes.   Make sure your tapes are set to expire weekly and you'll have to add extra tapes to the rotation to make sure they have a chance to expire.  I find if the tape is set to expire on the same day of your scheduled backup it always fails.   I haven't looked at DPM 2012 yet but I hear it's better.