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Thanks, your advice worked but I found that I had to bend pin 47 aside not pin 48. When I bent pin 48 aside the drive did not even power up when I turned on the computer. I straightened out pin 48 and bent pin 47 and it worked. Josh On Thu, 20 Mar 1997, Alexander J. Annala wrote: > The following advice applies only to the single drive TP systems -- dual > drive capable systems like the TP760 require a different approach. IBM > (and according to technical support -- the rest of the drive industry) > changed the sense of the drive 0 (master) and drive 1 (slave) jumpers on > transitioning from lower density drives to 2.1 GB drives. On the older > drives jumpering pins 47 and 48 set drive 0 (master) and jumpering pins > 49 and 50 set drive 1 (slave). On the DCRA-21260 jumpering pins 47 and > 48 set drive 1 (slave) --and-- no jumper selected drive 0 (master). The > old TP750/TP755 caddy jumpers pins 47 and 48. So what may be the easiest > thing to do is to bend pin 48 flat against the IDC block to the right and > away from the other pins -- effectively removing the pin 48/49 jumper to > yield a drive select of 0 (master). This works fine in my TP750Cs. When > you are ready to resell the drive just straighten up pin 48 -- and voila, > the original DCRA-21260 is restored with the original DCRA-21260 select. > I would not cut off pin 48 as recommended by IBM OEM technical support. > > You can also buy a customized caddy from people like Road Warrior which > changes the drive select for you via a customized cable in their caddy. > This is probably the best solution for dual disk capable boxes (TP760). > Be certain to specify the caddy is for IBM's OEM DCRA-21260 hard drive.