created as /dev/mdX, then the minor number X is stored.
.TP
.B devices=
-The value is a comma separated list of device names. Precisely these
-devices will be used to assemble the array. Note that the devices
+The value is a comma separated list of device names or device name
+patterns.
+Only devices with names which match one entry in the list will be used
+to assemble the array. Note that the devices
listed there must also be listed on a DEVICE line.
.TP
.B level=
will, when monitoring the arrays, move a spare drive from one array in
a group to another array in that group if the first array had a failed
or missing drive but no spare.
+
+.TP
+.B auto=
+This option declares to
+.B mdadm
+that it should try to create the device file of the array if it
+doesn't already exist, or exists but with the wrong device number.
+
+The value of this option can be "yes" or "md" to indicate that a
+traditional, non-partitionable md array should be created, or "mdp",
+"part" or "partition" to indicate that a partitionable md array (only
+available in linux 2.6 and later) should be used. This later set can
+also have a number appended to indicate how many partitions to create
+device files for, e.g.
+.BR auto=mdp5 .
+The default is 4.
.RE
.TP
ARRAY /dev/md5 uuid=19464854:03f71b1b:e0df2edd:246cc977
.br
spare-group=group1
+.br
+# /dev/md/home is created if need to be a partitionable md array
+.br
+# any spare device number is allocated.
+.br
+ARRAY /dev/md/home UUID=9187a482:5dde19d9:eea3cc4a:d646ab8b
+.br
+ auto=part
MAILADDR root@mydomain.tld
.br