Just wanted to share with you recent issue with DPM 2012 R2 and Hyper-V failover cluster with few nodes Windows 2012 R2 and hundreds VMs. It was a while since I installed UR 13 on DPM, but few days ago I found I can’t modify or create protection groups anymore, I only could see the clustered object, but I could not expland it to get it’s resources:
Sometimes I got DPM ID 36 error:
DPM cannot access the (vmname) because part of the path has been deleted or renamed
Check the path and enter it again
The cluster’s nodes and DPM servers were restarted but it didn’t help. Also I noticed all DPM servers connected to this cluster have similar issues. The case in Microsoft Premier Support was opened. After some troubleshooting, we found that DPM can backup only those VMs, which are running on Hyper-V host with newly installed DPM agent.
So solution is: reinstall DPM agents on all cluster’s nodes, just remove them from “Add/Remove Programs”. No reboot required, just delete this key in registry after installation – HKLM\Software\Microsoft\Microsoft Data Protection Manager\Agent\2.0\Restart Pending” . If you have more than one DPM server, you have to add permissions with command “BIN_DPM_DIR\.setdpmserver -add -DPMServername dpm_server_name” on each cluster’s node.