8TB Western Digital Purple Pro Surveillance internal HDD, SATA 6 Gb/s, 256MB cache, 3.5"
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https://www.westerndigital.com/en-ap/products/internal-drives/wd-purple-pro-sata-hdd?sku=WD8002PURP
| Device Type: | Hard drive - internal | 
| Capacity: | 8 TB | 
| Form Factor: | 3.5" | 
| Interface: | SATA 6Gb/s | 
| Buffer Size: | 256 MB | 
| Features: | Advanced Format technology, Conventional magnetic recording (CMR), support up to 64 cameras, AllFrame AI, tarnish-resistant, workload up to 550 TB per year | 
| Width: | 101.6 mm | 
| Depth: | 147 mm | 
| Height: | 26.1 mm | 
| Weight: | 715 g | 
| Performance | |
| Drive Transfer Rate: | 600 MBps (external) | 
| Internal Data Rate: | 267 MBps | 
| Spindle Speed: | 7200 rpm | 
| Reliability | |
| MTBF: | 2,000,000 hours | 
| 24x7 Operation: | Yes | 
| Non-Recoverable Errors: | 1 per 10^15 | 
| Load / Unload Cycles: | 600,000 | 
| Expansion & Connectivity | |
| Interfaces: | 1 x SATA 6 Gb/s | 
| Compatible Bay: | 3.5" | 
| Power | |
| Power Consumption: | 7.3 Watt (read/write) 6.5 Watt (idle) 0.3 Watt (standby) 0.3 Watt (sleep) | 
| Software & System Requirements | |
| Software Included: | Western Digital Device Analytics | 
| Miscellaneous | |
| Compliant Standards: | ROHS Directive 2015/863/EU, ROHS Directive 2011/65/EU, BSMI, CB Scheme, FCC, ICES-003, KC, Maghreb, NMB-003, RCM, TUV, UKCA, UL, VCCI | 
| Environmental Parameters | |
| Min Operating Temperature: | 0 °C | 
| Max Operating Temperature: | 65 °C | 
| Min Storage Temperature: | -40 °C | 
| Max Storage Temperature: | 70 °C | 
| Shock Tolerance (operating): | 30 g | 
| Shock Tolerance (non-operating): | 250 g | 
| Sound Emission: | 27 dBA |