SPC <spedraja at ono.com> wrote: Not neccesarily. The BA23 backplane is also a distribution board for the RQDX controllers. But for the RQDX3 you also have a separate board, called RQDXE (if I remember right) which do the same thing, and makes it possible to use the RQDX3 without a BA23. If you have a BA123 you always need the RQDXE, and if you wanted to use more than one hard drive on the RQDX3 you also need the RQDXE, since the BA23 distribution board is buggy, and can't actually connect two hard drives, even though you have two connections. I think it's worth pointing out that people should never even try connecting two hard drives in a BA23. You'll definitely wreck whatever contents you have on the disks if you try. Another option to use a RX33 would be to get a RQZX1, but that is probably harder to fine, and more expensive. Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol