Re: This one obviously needed a chalk pentagram in the computer room...
"Not one, not two, but THREE SCSI controllers - one for disks, one for a CD-ROM and one for a tape drive."
GIven the utter shittiness of a lot of pc-grade scsi tape and cdrom drives, that may have been a wise choice - your experience seems to bear that out - they really didn't play nice with others
And a hell of a lot of scanners assumed they were the only device on the bus