So I got 4 hard drives total: 1x 74gb raptor for my operating system, then I got 2 x 320gb seagates and 1 500gb seagate... my question is can I setup RAID 1 on my 3 seagate drives? leaving raptor by itself ? I just want all 3 seagate hard drives to have exact same copy of my data on every drive, tell me if I can do it with RAID 1 or what else I need ?