I just reinstalled my system going from FC2 to FC4 and when I setup the RAID in Kudzu I created a RAID0 with my two disks... # cat /proc/mdstat Personalities : [raid0] md0 : active raid0 hdb1[1] hda3[0] 237753600 blocks 256k chunks unused devices: <none> # df -h Filesystem Size Used Avail Use% Mounted on /dev/md0 220G 9.6G 199G 5% / /dev/hda1 289M 20M 255M 8% /boot What I meant to do was create a RAID1 set - what's the best way to get there without starting over? I can add a disk big enough to mirror md0 - is it possible to have /dev/md0 and say /dev/hdcX as the other member of a RAID1 set? Any good tutorials on doing this? TIA Don