A Virtual Tape (VT) server residing on a network is connectible on its front end to a plurality of heterogeneous backup hosts, with different operating systems and/or backup applications, and on its back end to one or more disk storage devices in an open systems environment. The VT server responds to...http://www.google.com/patents/US20040153614?utm_source=gb-gplus-sharePatent US20040153614 - Tape storage emulation for open systems environments
