HP MDS 9124 2nd/Spare Power Supply. Nominal power: 50W. Weight: 1.27 kg. Bundled software: SAN-OS; Cisco Fabric Manager. Dimensions (WxDxH): 165.1 x 304.8 x 50.8 mm, Compatible operating systems: MDS SAN-OS Release 1.0 (3) or higher, Bandwidth: 1.440 Gbit/s