Norco Swap Rack Components SS-500 Drive Bay: Turn 3 x 5.25" drive bay to 5 x 3.25" hot swappable hard drive bay Interface: SATA to SATA; SAS to SAS Fan Sensor: Fan failure sensor Alarm: Overheating alarm Cooling System: One 80mm ball bearing fan with air duct provide excellent cooling air flow RAID: Supports RAID 0, 1, 5 functions (RAID card required) Power Connector: 4-pin Molex power connector x 2 Data Connector: SATA (I, II or III) / SAS 6G data port x 5