Norco 3U Rack Mount 16-Bays SATA/SAS Server Chassis RPC-3216 Case Type: 3U Rack mount M/B Compatibility: Support EEB (12"x13"), CEB (12"x10.5"), ATX (12"x9.6"), Micro ATX (9.6"x9.6") Drive Bays: 16x hot-swappable SATA/SAS drive bays, 1x slim CD-ROM bay, 2x 2.5" OS drive brackets, 1x 3.5" OS drive bracket Connector: 1x front accessible USB port; 4x internal SFF-8087 Mini SAS connectors; 10x 4-pin Molex redundant power connectors Switch: 1x Power ON/OFF, 1x System reset Indicator:1x Power ON/OFF, 1x HDD, 2x NETWORK Cooling System: 4x 80mm middle fans, 2x 60mm rear fans Power Supply: None