Two ways to set this up:

1. Two separate TSM server sharing the library: use different categories and
be careful.
2. Have one of the servers act as the library manager.  The second asks the
first for resources and tape mounts, etc.  The first server knows about all
of scratch volumes, same categories.  See library sharing documentation.
You also need a license for this option.

Option 1 with the 3494 is probably the way to go.  Unless you have SAN
attached drives.  Then use 2 so you can share the drives between the two
servers.

IMHO.

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