The argumentment can also come immediately after
"-a". e.g. "-ap".
+If
+.I --scan
+is also given, then any
+.I auto=
+entries in the config file will over-ride the
+.I --auto
+instruction given on the command line.
+
For partitionable arrays,
.I mdadm
will create the device file for the whole array and for the first 4