'Transfers the VHD of a running instance to another host, then shuts
off the instance copies over the COW disk'

def migrate_disk_and_power_off(self, context, instance, dest, flavor, network_info, block_device_info=None, timeout=0, retry_interval=0):

    return self._vmops.migrate_disk_and_power_off(context, instance, dest, flavor, block_device_info)
