Instruct mdadm to create the device file if needed, possibly allocating
an unused minor number. "md" causes a non-partitionable array
to be used. "mdp", "part" or "p" causes a partitionable array (2.6 and
Instruct mdadm to create the device file if needed, possibly allocating
an unused minor number. "md" causes a non-partitionable array
to be used. "mdp", "part" or "p" causes a partitionable array (2.6 and