a b c d g h How I set up raid: Check dmesg to figure out which drives to use fdisk /dev/hd? and make one big partition, type fd build /etc/raidtab (man raidtab) mkraid /dev/md0 mkfs.xfs /dev/md0 make /raid and put /dev/md0 in /etc/fstab mount /raid Since I used type fd in fdisk, it will autodetect the array on boot and fstab will cause it to automaticly mount. I used XFS for it's advanced resize support.