TK70 sticky unload button?

Peter Coghlan cctalk at
Wed Sep 2 15:20:20 CDT 2015

> I fixed the button (replaced it with a standard push button), but it still
> doesn't want to eject my TK50 tape I put in. Blinks all three LEDs. It
> looks relatively dust-free inside. I may can get some canned air and blow
> it out better, but besides that, is there any more debugging I can do, even
> from the >>> prompt or VMS? I can get a video showing the tape motion.
> Seems to load without issue, but it doesn't really start winding back upon
> pressing the unload button.

If the tape has data on it, is is most likely in VMS BACKUP format.  You may
be able to list the contents with something like:


You might be able to unload the tape with:


but you would have to successfully mount it first, either explicitly with
something like:


or implicitly by using the BACKUP /LIST command above.

Peter Coghlan.

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