I have a beige G3/300 Rev 3 desktop with an XLR8 G4/500 upgrade.

I just switched from OS 9.1 to 10.1.3. For the first day or two, my system recognized the old SCSI hard drive I have attached. Now it's disappeared.

My Mac has the original internal SCSI controller it came with. I suspect this is a familiar problem. Anyone have a solution? Thanks for any help.