Hi,

New two node Hyper-V cluster running Windows 2012R2.

Storage is delivered through a standalone Windows 2012R2 iSCSI Target server, with CSV.

We have about 14 VMs running on the cluster, so far no problem.

The problem comes when trying to backup the VMs using DPM 2012R2 and the Microsoft iSCSI VSS provider.
It creates the shadow copy fine on the iSCSI target server, but then my CSV volume goes offline for about a minute or so until it gets re-assigned to another node of the cluster, then comes back online.

Meanwhile of course, all the virtual machine crashes.

It sounds similar to problems I have seen in the past with Windows 2008R2 and 2012 clusters, but I can't find any of the hotfixes for 2012R2.

Any ideas?

Thank you,
Stephane