At work today, during some down time, I was rotting my brain on youtube. I ran across a "test" pitting a 128 gig SSD against a pair of 1 TB 7200 RPM drives in raid 0. The SSD destroyed the 2 TB raid array. My question is since raid 0 is all about speed, how may spinning drives would it take to close the performance gap with an SSD. There is no way I'm going to spend that much money on spinning drives, but it is an interesting question anyway.