>A tape goes from Pending status to Empty Status after the re-use delay
>period is up.  What process or command triggers the status change from
>Pending to Empty, i.e. what causes the tsm server to go check all the
>tapes in pending status to see if their re-use delay period is up?

David - "You Don't Need To Know".  :-)

The server subdivides its work among a variety of worker threads, some of
which are termed "agents".  The 'SHow THReads' command will give you a
sense of the various areas.  From what little I know, the server has some
general time-based lookaround (housekeeping) tasks, which look around every
so often to see what general things need doing, as well as specialized
tasks to work on certain areas.  Suffice to say that its internals will
take care of such things.

  Richard Sims,  http://people.bu.edu/rbs