In case anyone wants to take a look ... I shot a couple of quick pictures of these huge IBM disk drives and stuck them: http://members.home.net/ip500/ibmdiscfront.JPG http://members.home.net/ip500/ibmdisccu.JPG http://members.home.net/ip500/ibmdiscback.JPG No good reference for scale, but they are about 4' long X 2' dia and weigh approx 140 pounds [that's not including the motor & belt drive visable in picture 1]. These were mounted as pictured [upright], 2 to a cabinet, the motors were mounted above the drives and ran a 1.5" width belt down to the drive pulley. I can hardly beliefe these are circa 1985!