Are you still going down the raid mirror route?? Ive got a problem with mirrored hard drives cuz if ones data becomes corrupted or a virus is caught its on both.I personally would stripe the raptors and use something like ghost the newest version of which does incremental back ups in windows,although ive heard this slows the system.You can back up to hard drive or to dvd/cd.Ive searched to see if this has been covered if it has I apoligise