I have been trying with little luck to get DPM 2010 on it's feet backing up VMs on our cluster nodes.
We have a cluster of (5) servers, running 2008 R2. The cluster is running only Hyper-V VMs, distributed across the nodes. The SAN is running Storage Server 2008 (R1), which is providing CSVs for the VMs to reside on.
I have been trying to get the hardware VSS providers working in order to perform "best practice" backups of the VMs. I do not want to take the performance hit of serialized backups.
Here is what I have done so far, as far as modifying our environment to support this:
- I have added our storage server to the domain. It was not previously.
- I created an account called 'sys_iscsi' in AD. I added this account to the local administrators group of all cluster nodes, and the storage server.
- I installed iscsitargetclient.msi on all cluster nodes, using the above username and it's password as part of the setup process.
I am not sure what I am missing, as from what I've studied from the relatively scant documentation I've found, that's about all there is supposed to be to it.
On the DPM server, when I create a protection group, I target the cluster's object, and a hyper-v host contained underneath it. However, the initial backup fails, with "Replica is inconsistent." When I attempt to perform a consistency check, the job fails after 30-60 seconds, generating this error:
Failure occured while adding one or more of the volumes involved in the backup operation to snapshot set. Please check the event log on [hyper-v VM that was targeted] to troubleshoot the issue. (ID 30290 Details: Internal Error Code: 0x80990A00)
What is strange is that the error is telling me to look on the event log of the VM that was targeted, even though the backup takes place at the cluster level, so the VM should not even be aware that it's being backed up. Regardless, I checked the event logs on the target VM, and there was nothing there.
All of the information I have found relating to this error is pertaining to third party SAN appliances, and not Windows Storage Server 2008, so any assistance I can get would be appreciated.