On Mon, 28 Oct 2002, Will Jennings wrote: If the system is a dual tower configuration, it almost always uses ESDI drives, but the single tower deskside 'cubes' always have a SCSI bus in them. AFAIK, the dual tower was retired around the time of the 2x0, so I guess it could indeed use ESDI drives. I have yet to have seen a 2x0 in a dual tower, but I suppose they might exist. A photo of the system itself would pretty much clear it up. The cpu boards in these are actually interchangeable for the most part, and the deskside chassis can accept up to two such boards with up to two cpus each for a total of 4 processors. The predator rack chassis support up to 4 cpu boards for a total of 8 cpus. -Toth