You can have two hard drives on a single IDE controller One you set to master the other to slave. The cable select allows the controller to make these decisions (kind of a automatic selector) but not all IDE controllers support this feature sooooo It's recommended that you either set these jumpers in the master/slave mode or both of them in the cable select mode and if the cable select mode doesn't work than you must set them manually. -- Doug LaBore > > I have a G4 400mhz Sawtooth. I am using Jaguar. I have > set up the jumpers according to the respective drive > specs. However I will examine that issue again. > > What is "Cable Select"? I went to Mac Help and couldn't > find anything that seemed relevant to hard drives. > > Thanks, > > Bill >