I have a tape that says it is empty if I do a 'q content', but it will not
go back into scratch.
If I do a 'delete vol' I am told there is still data on the tape.

I am guessing that a set of files is 'bundled together' (I forget the
official techno speak for this, but it helps cluster lots of small files
into one larger file), and the bundle extends over two tapes, and this is
the second tape.  But that is ONLY A GUESS.

Is there a way to verify this?

... Jack