Western Digital Ultrastar DC HC555 internal hard drive 18 TB 7200 RPM 512 MB 3.5 SAS3

24/7 operation: Yes | Operating voltage: 5 / 12 V | Start/stop cycles: 600000 | Warnings: Do not dispose of in normal waste, special disposal. | Warnings: Avoid exposure to extreme temperatures. | Warnings: Store away from water and moisture. | Height: 26.1 mm | Width: 101.6 mm | Power consumption (typical): 8.8 W | Non-operating shock: 250 G | Component for: Server/workstation | Storage temperature (T-T): -40 - 70 °C | HDD average transfer rate: 269 MB/s | HDD capacity: 18 TB | Operating vibration: 0.67 G | Power consumption (idle): 5.4 W | Operating shock: 50 G | Depth: 147 mm | HDD sustained transfer rate: 257 MiB/s | Mean time between failures (MTBF): 2500000 h | Weight: 679 g | Non-operating vibration: 1.04 G | Operating temperature (T-T): 5 - 60 °C | Interface: SAS3 | HDD size: 3.5" | HDD speed: 7200 RPM | Type: HDD | Storage drive buffer size: 512 MB | Hot-swap: No | Average latency: 4.16 ms | HDD interface transfer rate: 12 Gbit/s | Warranty period: 5 year(s)