RDPetruska wrote: And, you can't use the same disk name as both source and destination.
Actually, as I sure you well know, the sourceDisk.vmdk and the destinationDisk.vmdk can indeed be the exact same name providing the path of the destinationDisk.vmdk file is in a different location then the sourceDisk.vmdk. It can then be moved into the VM's folder afterwards after moving the sourceDisk.vmdk out.