as far as I know, you only need hardrives that are the same size/rpm, though it is probably adviseabel to use the same amount of cache as well. if your motherboard supports onboard raid, then just read up on it, if not, get a raid adapter and more or less just plug it in. and FYI that SAS 37GHB hardrive is unbeleiveably fast, about as fast as two raptors in RAID0... not quite, but almost.
Ok thanks for the info dude.. and my current HD has either 8mb cache, which is ok, or one less than that..which i think is 2mb..or 4
