If it's set as slave, it should work. These settings, you must find on the disk, or from the manufacturer. Paul Moortgat On 3-jun-04, at 03:31, Dale Hoffman wrote: >> >> Another problem could be that his G4 simply does not support two hard >> drives on the same circuit and won't recognize anything more than the >> original individual Master drive. >> > > Ron, > > Not the case. I've installed dozens of second internal drives into > G3/G4's. In fact it was my reassurance that prompted my friend to go > ahead and try it on his own. That and the fact that Apple has > instructions in its user manual for installing additional hard disks. > > DaleH