Ho provato ad usare http://www.ir3ip.net/iw3grx/docs/RAID1-mini-HOWTO.pdf che è specifico a MDK e leggendo anche http://slacksite.com/slackware/raid.html vedo:

raiddev /dev/md0
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
device /dev/hda1
raid-disk 0
device /dev/hdc1
failed-disk 1

raiddev /dev/md1
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
device /dev/hda3
raid-disk 0
device /dev/hdc3
failed-disk 1

raiddev /dev/md2
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
device /dev/hda5
raid-disk 0
device /dev/hdc5
failed-disk 1

raiddev /dev/md3
raid-level 1
nr-raid-disks 2
nr-spare-disks 0
persistent-superblock 1
device /dev/hda6
raid-disk 0
device /dev/hdc6
failed-disk 1


per quello che io utilizzo più di una mdx