Should be easy enough    Steps are basically: stop the VM copy any vdisks to their new location on the Unassigned Device Edit the VM settings (easiest in XML view) to adjust the paths for the vdisks you have just moved to point to their new location on the UD drive start the VM that should be it   i suggested copying the vdisks rather than moving them to give you an easy fall-back position.    After you are happy the moved VM is working as expected you