Disk to Tape
Historically, all backup and archive has been done in a single step, one tier, from primary disk storage to tape. Although cost-effective, the downside is performance both in transferring data to tape and retrieving data from tape.


Disk to Disk to Tape
To increase throughput and data retrieval performance, many companies implement an interim step by backing up data from primary storage to a hard disk system from which data can quickly be retrieved. At some later time, the data is then transferred to tape for off-site archive storage and disaster recovery. This interim step adds another level of complexity and cost. Also in event of a disaster, it is likely that the backup disk, which is not removable, will be lost along with the primary storage.


Disk to Removable Disk
Because it uses disk technology, the RDX system reduces the levels of complexity and cost by eliminating the need for the interim backup disk. The RDX system provides a complete disk-to-removable disk process (D2RD) that benefits from:

• Disk write performance and fast file access for data backup and retrieval.
• A ruggedized, removable and reliable media cartridge that can safely be used for both data archive and disaster recovery and which, in the event of recovering from a disaster or restoring an archived file, can randomly access files and restore them at up to 45 MB per second.

Using RDX technology, the company benefits from a D2RD solution that features disk-to-disk throughput, fast data retrieval performance (15 millisecond seeks), simplified complexity and a 99.999 percent confidence factor that the data will be fully readable after over a decade of archival and non-operating storage.