OK, but I hv 4x SATA plugs on Mobo, can I use say Disc 0/1 for Raid0 with the 2x 120GB discs and only for video storage, and say Disc 3 for a smaller say 80GB SATA for programs and still use the single open ATA for 80GB disc for a library.
Main need for RAID is when rendering, so can I hv the OS on a HD seperate from the Raid?

Sorry if this confusing, but so many possible configs and I want to settle for one. If this means purchasing additional HD's, then no prob.

Thkx the help.