WD's My Book Premium Edition II dual-drive storage system offers RAID mirroring for extra data protection or RAID striping for extraordinary capacity and performance. Triple-interface and a powerful combination of features and performance make this system the storage solution of choice for creative professionals, workgroups, small offices and anyone looking for extra assurance that their data is safe.
Interfaces: 1 x Hi-Speed USB - 4 PIN USB Type B ¦ 1 x IEEE 1394b (FireWire 800) - 9 pin FireWire 800 ¦ 2 x IEEE 1394 (FireWire)
2 years warranty
Raid Mirroring means only 500GB is actually available.