1U Rackmount enclosure with DualPAK removable drive carriers that accept two hard drives each, Ideal for disk-to-disk backup where users can ""pull"" a backup snap shot at anytime, Rugged Sheet Metal Design and Shock-mounted DualPAK multi-disk removable drive carriers for drive protection during operation, removal, transporting and storage, Available in Quad RAID (eSATA, USB 2, 0, FireWire 800/400) or Multilane Point-to-Point SAS/SATA JBOD, SKU: DH4800000000000