In the "useless trivia" category, DEC Rainbows all support 4 floppies (= 2 x RX50 drive) out of the box, though most came with only one RX50. IMPDRV, by Warner Losh, will let you hook up a 3.5" drive in place of one of those RX50's. However, I know of no way to get "normal" 5.25" or 8" drives hung onto the Rainbow, so I strongly suspect this is not of much use to you. - Mark