Hi,
I hope someone can advise. I have a problem of my own making. I cannot resolve it and would appreciate some guidance if possible.
I have a clustered environment protected with DPM 2012 R2 UR3. As part of routine testing I recently restored a VM to a non-clustered hyper-V host (HV2). All went well with the restore, but it ran overnight. Once the restore completed it attached to the Hyper-V manager on HV2, but it did not turn on the VM. HV2 has a DPM Agent installed.
When my nightly DPM job ran, the PG that the VM was in decided that the VM was hosted on HV2 and changed the PG to reflect that.
The next morning, I checked the restores, everything worked fine, so I deleted the VM from the HV2 and deleted the VM files. At which point, DPM couldn't find the Server, and backups started to fail. When I realised what was happening, I removed the VM from the PG and attempted to re-add it. It kept coming up as a VM on HV2, not the cluster, and wouldn't re-add as a cluster member. When I expand the cluster in the Modify Group wizard, I can see the VM, but it does not have a checkbox bedside it. So I was stuck with a VM outside the PG and couldn't re-add it. I decided to create a new PG for that VM and it still thought it was on HV2 until I clicked the CLEAR CACHE button. Hey presto, the VM was no longer on HV2 and it appeared in the cluster with a checkbox. So I added it to the PG, set everything up to run out of hours and left it to run. The next morning, the new PG had failed to back up the VM and again it thought the VM was on HV2.
DPM keeps failing to find the VM correctly. The DPM error code is:
The operation failed for Microsoft Hyper-V \Backup Using Child Partition Snapshot\VM1 on HV2.domain.net because the data source is not available. (ID 30169 Details: VssError:The specified object was not found. (0x80042308))
I can only think that this is an entry in the SQL Tables that keeps resetting the PG settings, since everything else appears to be OK. Has anyone else had a similar issue? Or does anyone know how I can resolve this? I have been without a good backup for a few days and I'm getting nervous!
Many Thanks
John
Regards, John