Creation

Warning

Only use partitions, never whole devices, otherwise assembly will fail after reboot!

RAID 0

mdadm --create /dev/md0 --level=0 \
--raid-devices=2 /dev/sd[bc]1

RAID 1

mdadm --create /dev/md0 --level=1 \
--raid-devices=2 /dev/sd[bc]1

RAID 5

mdadm --create /dev/md0 --level=5 \
--raid-devices=3 /dev/sd[b-d]1