I have used RAID 0 on my last 2 machines and I love the speed advantage. My next machine will be RAID 5 capable and I will probably use it. Windows sees a RAID 0 array as a single drive with the capicity of both (all) drives. Since RAID 5 adds parity data doesn't that effectively reduce the storage space of the 3 drives? If so is it reduced by 1/3? Does Windows see 3 80 Gig drives as a 240 Gig drive or a 160 Gig drive?