I think the SCSI controller on my PowerMac 7500 is dying. I have the factory 500MB drive and a Seagate 4.5GB drive. Both are using Apple's drivers.
Lately, the Seagate drive does not mount when I boot. It used to come up when I forced it with SCSI Probe, but now it won't come up at all. Then yesterday, it came back up. I checked it with Disk First Aid, and it was ok. When I rebooted, the drive disappeared again.
The System folder is on the 500MB drive, and twice the 7500 refused to boot (blinky question mark at boot), but I was able to boot it with a CD and then it rebooted from the drive ok.
Is this a problem with the motherboard SCSI controller?
Also, I took the $50 SCSI card that I got with my G4/450, and put that in the 7500 and then hooked up the drives to that instead of the motherboard SCSI connector. The 7500 wouldn't boot at all, and the screen stayed black the whole time. Do I have to disable the on-board SCSI first? And if so, how?
Thanks in advance,