A couple of days ago some of our VMs started creating avhdx files when our backups ran (DPM 2012 r2)
We know that DPM uses checkppoints, but until now these checkpoints have behaved as expected, being removed and merged when the backup is complete. This also happens on the affected servers, with the exception that the avhdx files stay (and are used by the server). No check points are visible, and using Get-VMSnapshot shows no checkpoints/snapshots - so basically the backup process just creates new avhdx files every time we back up the servers...
The strange thing here is that ONLY disks attached a virtual SCSI controller seem to have the problem...
As an added bonus the VMs settings window claims the VM has Checkpoints, but nothing in the Hyperv manager (and the /Snapshots folder is empty)
Any idea how to fix this problem?