On a Beige G3 I have added a PCI card to allow extra hard drives. Currently a Quantum 4gig is the Master. Slave is a Samsung 40gig partioned as 4, 10 gigs.
On Boot up the Quantum boots. The Samsung does not even show on the desktop. Apple profiler shows all four partitions as "Note: not mounted"
Also -- the factory installed CD -ROM drive does NOT show up with a non-boot disc in it. A boot disc can be called up with the C key start. But with the same disc in it the drive does not show on the desktop. Apple Profiler says only "No mounted media inserted" even though there is.
I could go on and on about the ramifications of the this problem and how the drives seem on occasion to come and go.
I have re-seated the PCI board, all of my ram and the power supply cables to the drives as well as the ribbons themselves. I have even switched the drives to be sure the ribbons are OK. They seem to be.
I am about to consign the G3 to boat anchor status.