In this three-way 13, 3 cm (5.25") plug-in board you can install up to four 8, 9 cm (3.5") SAS or SATA hard disks. You can run your hard disks in normal operation over the Hot-SWAP capable back plane or over its Main board, configure any RAID combination. The four ways are separately lockable to ensures a safe enterprise at any time & ensure built-in 80 mm low noise fans for the necessary cooling.