On Sunday, Sep 28, 2003, at 00:08 America/New_York, John Wilson wrote: I'm curious as to why you moved the drives around and set them to slave and master Hello No real reason. I upgraded to a G4 from a G3 B&W and that is the way I configured drives on the ATA buses on the G3. Always worked for me. And I just did the same thing( dumb luck?) But actually, my prior "research" via the MacWorld , MacHints and OWC forums identified many other guys who updated their G4s the same way in order to make the Pioneer Superdive work with the Apple Combo Drive BTW. Being from the "old school" ( on Macs since 1985) I am completely unfamiliar with cable select CS jumpering ; that is, what it is and what is does! I guess that you cant teach an old dog new tricks! albert