Maybe this is common knoledge and it is just new to me but I though I might share it anyway. Not to long ago I discovered that my siig raid card performed substantially faster than my promise 4 channel card (even though the promise is a much more expensive card). Thats using the same exact hard drives. The siig was much faster with 2 drives than the promise was with 2 or 3 drives. Well I was helping a friend setup raid last night. He has sata 1 raid and sata 2 raid on his motherboard. One uses a silicon image controler and the other uses an nvidia controler. I sugested that he try both and benchmark them. the sata 1 controler using the nvidia raid controler performed resonably faster using the same drives. I have seen lots of comparisons on the speed of diffrent drives for raid buy have yet to have ran across any comparisons of diffrent cards with the same dirves, and how their speed compares. It would seem that the controler can make a huge diffrence on the speed, reguardless of what drives are used.
I just though some of you might find this interesting.