-options are: linear, raid0, 0, stripe, raid1, 1, mirror, raid5, 4,
-raid5, 5, multipath, mp. Obviously some of these are synonymous.
+options are: linear, raid0, 0, stripe, raid1, 1, mirror, raid4, 4,
+raid5, 5, raid6, 6, multipath, mp. Obviously some of these are synonymous.