Fast way to create or assemble mdadm devices

Booting from cd and no /dev/md devices? First, correct kernel modules are needed. modprobe raid1 If configuration uses different raid, then a different raid module should be loaded. Be it a raid 0,5,6 or whatever. Devices can be made then mknod /dev/md0 b 9 0 mknod /dev/md1 b 9 1 and so on. As many of them as needed. From this point on door is open for mdadm create,assemble or whatever is needed. Creating a device goes like this: mdadm --create --verbose /dev/md0 --level=1 --raid-devices=2 /dev/sda2 /dev/sdc2