Open DPM Management Shell and use the following command to enable tape drive data co-location:
Set-DPMGlobalProperty -DPMServerName YourDPMServer01 -OptimizeTapeUsage $True
Source: MS Technet
A while back I had issues with my DPM 2007 and my Exchange 2007 db. DPM 2007 kept telling me that my Exchange 2007 db replica is inconsistent. I found this blog post which helped me. I thought it would be good to add it to my blog as a reminder and to share it with others.