Having 2 disks on Raid 0 is fast, real fast. You really notice it when you are dealing with big files, like when you are making a compilation from various family home videos (from the children, nothing frisky). And with 80gb hard disks @ $35 bucks, we can now start thinking about triple or quadruple Raid 0 arrays. But when do I reach the limit? When it becomes so fast that adding an additional disk won't make much of a difference? How do I calculate what's overkill?