The HP Rack-mount Kits provide a high density, rack-mountable tape drive and RDX removable disk drive solution for both direct-attach SCSI, USB, or SAS backup and archiving applications. The HP 1U Rack-mount Kit supports DAT and LTO Ultrium internal tape drives, and RDX internal removable disk backup systems. The 1U rack-mount kit is available in SCSI, SAS and USB interfaces. With two LTO-6 Ultrium 6250 drives, the 1U SAS enclosure can provide a maximum compressed capacity of 12.5TB with a data transfer rate up to 2.8TB/hr. The HP 3U Rack-mount Kit holds two (2) full-height internal tape drives, four half-height internal tape drives, or a combination of one full height and two half-height tape drives. It is available in both SCSI and SAS interfaces. With four LTO-6 Ultrium 6250 SAS drives this enclosure solution can provide a maximum compressed capacity of 25TB.