The CD-ROM, if I recall, is SCSI on that Mac even though the hard drive is IDE.
My guess is that your SCSI controller is shot. Your best bet would be to find another 630 logic board and swap it. Also, try your drives on another Mac just to make sure.
My guess is that your SCSI controller is shot. Your best bet would be to find another 630 logic board and swap it. Also, try your drives on another Mac just to make sure.