Except that if I'm counting right, that's 4 drives total not including the hard drive(s). Or isn't the "Live Drive" a real IDE device? Anyway, you'll get 2 devices on each IDE channel, so you'll need another controller for the 5th device. You don't have to use RAID, in fact you can't use it unless you have multiple hard drives. The A7V133 comes with another IDE controller (made by Promise) built into the board. It's sometimes called the RAID controller because it's capable of RAID, but there is a jumper that you can change to use it for just regular IDE, and it gives you either 2 more devices or 4 more devices. I have not seen the A7V266 but I would be willing to bet it still has the Promise controller, just like the earlier A7V133 and the A7V.