Metal Disk Array Module w/Backplane Map-R23A/R34A/R46A Features: Full Aluminum mechanical design Special Power distributing electronic design. Bus Signal adjustment for signal skew. Impedance match for copper conductivity. Shock Resistance and accurate locating swap tray mechanical design. SCA connector. Automative HDD sensor and power up. Good Air Flow Design for cooling down the system (High Efficient Cooling Fans). Monitoring Fan Speed and Alert. Ultra 160 supported. Mount into standard 5.25 frame space. Model No. Map-R23A Map-R34A Map-R46A Drive Type Ultra 160 SCA SCSI HDD SCSI-ID Selector YES Front Panel 3.5" HDD Tray 3 x 1" height 4 x 1" height 6 x 1" height Rear Panel SCSI IN Connector x 1 SCSI OUT Connector x 2 SCA Connector x 3 SCA Connector x 4 SCA Connector x 6 Power Connector x 2 Power Connector x 3 Material Base Case / Tray Plate: SPCC Nickel-Plating Tray mask Assembly: Plastic ABS 94HB Front Display Panel: PVC Printing Cooling Fan(40x40x20 mm) 2 (Ball Bearing Fan) 3 (Ball Bearing Fan) 4 (Ball Bearing Fan) Fan Alarm Controller YES Dimension (WxDxH) 146x198x86 mm 146x198x128.4 mm 146x198x171.3 mm Packing N.W.: 1.6kgs N.W.: 2.0kgs N.W.: 2.7kgs G.W.:2.2kgs G.W.:2.5kgs G.W.:3.3kgs Meas.:0.451 CuFt Meas.:0.556 CuFt Meas.:0.661 CuFt