root@Knoppix:~$ sudo -s
root@Knoppix:~# modprobe md_mod
root@Knoppix:~# swapoff -a
root@Knoppix:~# dmsetup remove_all
root@Knoppix:~# dmsetup ls
No devices found
root@Knoppix:~# mdadm -A /dev/md0 /dev/sda3 /dev/sdb1 /dev/sdc1 /dev/sdd1
mdadm: /dev/md0 has been started with 4 drives.
root@Knoppix:~# mount /dev/md0 /media/test