He gave me 15 QIC-Tapes with it, unfortunately no documents. -- Moreover,serveral tapes are corroded. -- There were many different recording formats used with DC300 style tape cartridges before the QIC standards were established. Onyx tapes predate those standards. Assuming the tape itself isn't damaged, you can put the reels into new shells. You will need to use a DEI drive to read them. As I keep telling people, DON'T EXPERIMENT WITH TAPES YOU CARE ABOUT WITH DRIVES IN UNKNOWN CONDITION! It sounds like the capstan was bad in the unit, try some other cart you don't care about before risking these tapes (which are quite rare) in that drive. It would be a good thing to take high resolution pics of the boards and to dump any programmable parts.