ATAPICAM hangs with cdparanoia

Trying to rip a brand new CD with cdparanoia today, I've run into hangs
during the rip (read/seek within a track) process.  Sometimes it's a
"cbwait" hang, but it seems I can also get it to lock hard at the console.
Does anyone have experience debugging ATAPICAM/ATA/CAM that will come in
handy trying to figure out why this happens?

The most information I have right now is that it was a generic IO (read)
CCB, and when I looked at the union ccb inside the process doing the
xpt read request, "entries" was 0. Doing a camcontrol reset all locked
things up at that point.

Thanks for any help,
-- 
Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
  <> green_at_FreeBSD.org                               \  The Power to Serve! \
 Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\