This article is from the storage FAQ part2, by Rodney D. Van Meter with numerous contributions by others.
Backup software. See http://www.legato.com. Runs on a wide variety of platforms and supports a bunch of types of autochangers. Legato Systems, Inc. 3145 Porter Drive Palo Alto, CA 94304 Phone: 415-812-6000 Fax Number: 415-812-6032 Fax-on-demand: 415-812-6156