Given that each of these drives individually can sustain over 100 MB/s, and given that I'd expect RAID0 to scale roughly linearly with the number of drives, I was expecting in the neighborhood of 500 MB/s. What I got (according to bonnie++) was about 200 MB/s, less than half the expected data rate. Disappointed, I decided to give Linux MD RAID a try, which got me up to about 240 MB/s, 20% faster than the hardware RAID, but still disappointing.
My question for the slashdot geeks that play with this kind of stuff all the time is: What kind of performance should I expect out of a system like this? Does RAID0 always scale so poorly? And, just for good nerdish fun, what's the fasted storage I/O you've ever seen?"