For the sake of curiosity, would it be possible to set up a RAID 0+1 (or is it 1+0>) array with two F1 320gb drives, and a 640gb F1 drive. Where the 320s are effectively a RAID 0 setup, and the 640 as a backup (RAID 1)? Or would you have to set up a RIAD 0 with the 320s and use software/manually back up onto the 640?