do not use SCSI because just like IDE, it shares a line with ALL the other devices in the chain. and, its way harder to configure if your devices do not self-terminate. in case you dont know, serial lines, SCSI, and SATA all use the same type of technology. Except that, SCSI shares cables and must have a termination point (point at where the chain of devices ends). SATA is serial, but its a 1-device, self terminating connection. also, SATA is faster. A LOT FASTER!!