self._params.add_with_value(
'drive', 'file={img},format=raw,cache=none,if=virtio{locking}'.
format(img=self._opt.get('img'), locking=locking))
self._params.add_with_value(
'drive', 'file={img},format=raw,cache=none,if=virtio{locking}'.
format(img=self._opt.get('img'), locking=locking))