Why dual hard drives? What are the benefits derived from having dual hard drives? I know the obvious answere is one drive mirroring and backing the other up. Are there performance hits or perfomance jumps? If one drive backs up the other do the drives have to be matched? I ask this because I'm looking at the Falcon MACH V. You can outfit this system with dual 36Gig Raptors running at 10000 RPMs. Why would a gaming/multimedia machine need dual HDs? If there is advantages then would it be more advantageous to match the speedy Raptor HD with a beefier (say 120 Gig Maxtor) HD.