Seagate DAHUA ST6000VX0003 6TB HDD HardDisk 
>The industry's first surveillance-optimised hard drive precision-tuned for high write surveillance workloads operating 24x7
>Capacities up to 8TB support 64 cameras per drive and 8+ 1 drives per system
>Engineered for workloads of 180TB/year, three times that of desktop drives
>Low power consumption and startup current to minimise heat and vibration emission, improving long-term drive reliability
>Tarnish-resistant components to help protect drive from environmental elements, increasing field reliability
>Customise power settings for incremental savings during system downtime without compromising time to record
>Reliable performance in multi-drive systems with support from RV sensors
>Optional 3-year +Rescue Data Recovery Service plan to help protect against data loss from viruses, software issues or mechanical and electrical breakdowns