>If your G4 1.25 is like the Dual 1.4 I just purchased, then you should >be using "cable select" on the burner. Cable select "knows" where the >drive is "on the cable" and sets the mechanism automatically to the >proper "master/slave" setting. Thanks for the info, Eric. But seeing as I did this yesterday morning, and had no idea what "CESL" was. I set the Pionneer AO5 (now in the upper optical bay) to "master" and transfered the Toshiba combo drove to the lower bay and set it to "slave". > Apple System Profiler sees a Pioneer and a Toshiba, as does Toast. Successfuly burned to a DVD-RW using iDVD3 soon after. By the way, anyone else have a problem with the AO5 tray hitting the inside frame just behind the mirrored-door? I had to re-open the G4 case several times to adjust the optical housing so the tray would eject properly. > > >