I think in raid 0 you can double raid but not in raid 1...might be wrong. Boht situations are based on the lower speed (eg. raid 0= 2 drives, both accomadate storage and transfer equal to the lowest size and speed..........raid 1=2 drives, mirrored storage equal to the lowest drive capacity speed) so the transfer rate for an SATA 3gb/s and IDE 133mb/s in raid 0 would be 133mb/s...kinda sux. I'd boot it first.