Data Domain reduces data storage requirements by 20:1

"With data storage requirements growing astronomically, backup windows shrinking dramatically and the cost and administrative problems of tape management getting out of hand, users are looking for ways to ensure data protection in new, more cost-effective ways.
With the availability of less expensive disk, it has become feasible to implement new backup strategies using disk-to-disk (D2D) technology, with tape used largely or only for archiving and off-site backup. "
[Computerworld]