Don't over think it.  Remember, information about volumes is in the database
too and really, the only volume history record you are concerned about is
the one indicating the most recent db backup tape.  I routinely run, like
daily, a delete volhist type=all todate=today-30.

Kelly J. Lipp
Storage Solutions Specialists, Inc.
PO Box 51313
Colorado Springs CO 80949-1313
(719) 531-5926
Fax: (240) 539-7175
Email: lipp AT storsol DOT com or lipp AT storserver DOT com
www.storsol.com
www.storserver.com