I am trying to figure out what is the best setup for my situation that will give me the best performance. I have 4 drives for my Mac Pro Quad Core early 2009. 2 WD Caviar Blacks 1TB each 1 WD Caviar Green 1TB 1 WD Apple (Original HD) 640GB I want to be able to have a separate hard drive or partition for all my sessions from ProTools, Logic, Ableton, etc. I also want a separate hard drive or partition for all my audio files/video files (anything media). Then I want a Time machine backup of all the sessions and boot disk. I have a backup of all the audio/video files already on my laptop. (would this be the best way to split up the hard drives like this?) So what would be the best way to setup a RAID for performance and be able to have these separate drives. Would it be possible to setup a 3 drive RAID 0 with the 1TB hard drives. And then partition 1 drive for the boot disk (500GB), 1 drive for the sessions (500GB), 1 drive for the audio/video files (2TB). Then use my 640GB hard drive as a Time Machine backup of the boot and sessions hard drive. or should i even try to run a RAID setup? should I just try to run all my drives separately? so all in all i just want performance, reliability, and being able to back up the boot disk and sessions on one separate hard drive. Any suggestions?