1U (Rackmount), 8 x 8GFC Host Channel, 12 x 2.5" SAS Disk Tray (Bay), 2 x Controller w/ Cache (1GB Default, Upgradeable w/ 2GB , 4GB), 2 x Cooling Fan (Redundant), 2 x 380W PSU (Redundant), 2 x SAS Expansion Channel, 2 x Cache Backup Module, Options-(Advanced Data Service license, Mux Board, Hard Disks, Spare FRUs, & Other Accessories)