ch timeouts

[jnemeth%victoria.tc.ca@localhost (John Nemeth)]

     The media changer timeout is too short when removing media from a
data transfer element, as the operation may require an implicit tape
rewind.  I plan on fixing this by bumping the timeout to 10 minutes for
this operation.

     However, this uncovered a second problem for me.  Although my
changer will usually correctly abort the command when it is retryed
with an "Overlapped Commands Attempted" error, it has a nasty tendency
to lockup, requiring a power cycle.  I'm pondering if I should create a
quirk for my changer to not retry commands or if people have other
suggestions on how to handle it?