Western Digital WDH2NC60000E. Hard drive capacity: 6000 GB, Hard drive size: 63.5 mm (2.5 "), Hard drive rotational speed: 7200 RPM. Weight: 2500 g, Height: 166 mm, Width: 99 mm. Operating temperature range (T-T): 5 - 35 °C, Storage temperature range (T-T): -20 - 65 °C. Supported network protocols: Gigabyte ethernet