Error 1214 Virtual Machine resides on a LUN, which cannot be found

Question

Hi. Having a weird issue with one particular VM.
2-node 2012 Hyper-V cluster managed by VMM 2012 SP1. The cluster is running several VMs, all are working fine. One VM has passthru disk attached (before you start bashing me, this is a disk for DPM, which is running on this VM).
The problem is that any VM refresh job from VMM fails with the error in the title. When I go to VM properties in VMM, it cannot see any disks (VM has two - one system VHDX and one passthru attached disk).
From failover cluster manager, I can see all disks fine, the VM itself is working fine, only VMM refuses to see the disks and perform any tasks on the VM. Curiously, the VM status is OK, there are no errors.
I've tried moving the VM to another node, restarting the node, moving the CSV ownership, removing the passthru disk from the VM and add it back (via FCM), nothing helped. Also restarted VMM service.
What's the problem?

Answer 1

Hi,
Had the same problem but was able to fix it myself by doing the below steps,
1. Remove the pass through disk if you already added to the VM.
2. Remove from Cluster.
3. Turn off the VM.
4. Add the storage back to the cluster.
5. Right click the storage that you want to map to the VM and select Assign to another node.
6. Select the node.
7. Add a SCSI Hard drive from the VM settings.
8. Select the option to use physical drive.
9. From the drop down select the storage that you want to map.
10. Turn on the VM.
This fixed the refresh error for me in VMM 2012 R2 for DPM VM.
Thanks,
Ravi
Ravi shankar