Just went through the nightmare of setting the jumpers on the original CDC full-height drives for the IBM PC. As best as I can figure out, there are 3(!!) jumpers that have to be set on the top board. The Tandon drive is slightly better, there is only 1 jumper. Does anyone have the definative page(s) from the manual(s) or it's equivalent? Bill ________________________________________________________________ Speed up your surfing with Juno SpeedBand. Now includes pop-up blocker! Only $14.95/ month - visit http://www.juno.com/surf to sign up today!