It doesn't have a slave/master area separate from the IDE connectors. I can't remember if the old IDE cables were just that much thinner, or if its auto-set to some kind of setting already, but that could be the issue. Regardless, the IDE cord in this thing takes up the whole space. I was hoping it was just set to cable select or something. I dunno xD Its a good possibility that is the problem, though I wouldn't know how to work around that one since the only slots in the back are for the power and the IDE cable. No jumper section