Western Digital Ultrastar DC HC555 internal hard drive 18 TB 7200 RPM 512 MB 3.5 Serial ATA III

Non-operating vibration: 1.04 G | Warnings: Do not dispose of in normal waste, special disposal. | Non-operating shock: 250 G | Operating shock: 50 G | Weight: 679 g | Component for: Server/workstation | Warnings: Avoid exposure to extreme temperatures. | 24/7 operation: Yes | Warranty period: 5 year(s) | Height: 26.1 mm | Hot-swap: No | Start/stop cycles: 600000 | Operating temperature (T-T): 5 - 60 °C | HDD speed: 7200 RPM | HDD capacity: 18 TB | Width: 101.6 mm | Depth: 147 mm | Operating voltage: 5 / 12 V | Average latency: 4.16 ms | Type: HDD | Storage temperature (T-T): -40 - 70 °C | HDD interface transfer rate: 6 Gbit/s | HDD sustained transfer rate: 257 MiB/s | Mean time between failures (MTBF): 2500000 h | Interface: Serial ATA III | Warnings: Store away from water and moisture. | Power consumption (idle): 5.3 W | Power consumption (typical): 6.4 W | Storage drive buffer size: 512 MB | HDD average transfer rate: 269 MB/s | HDD size: 3.5" | Operating vibration: 0.67 G