It could just be worn out, that is around a 1998 drive and their quality at that point wasn't what it is today. It might just not recognise that media properly also.
The best media you could get when it was current was the USA TDK certified plus dark blue stuff. If you can find any similar to it it might like it better.
Get some Fuji somewhere and see if it works OK with it, that's the best current media for most drives. If it keeps doing it it's either dead or naybe your SCSI card doesn't like it or something like that, unless it's IDE, but I'm pretty sure they were all still SCSI then.