And what would happen, then, if the second set were also destroyed in
shipping?  The problem is one can never get to 100% reliability.  Given
that, one needs to determine how much to spend to ensure a reasonable amount
of safety.  I believe that one copy is adequate.

I have seen sites where two copy storage pools are in use.  However, most
sites rely on a single copy storage pool.  Where there are two, sometimes
one is actually kept onsite but not in the library.  In this fashion, they
can recover from a primary pool media failure without having to visit the
offsite.

Kelly J. Lipp
Storage Solutions Specialists, Inc.
PO Box 51313
Colorado Springs CO 80919
(719)531-5926
Fax: (719)260-5991
www.storsol.com
lipp AT storsol DOT com