Western Digital 4TB Purple Surveillance Hard Disk Drive.

4TB Storage Capacity 3.5" Form Factor SATA III 6 Gb/s Interface 256MB Cache Up to 180 MB/s Sustained Data Transfers 300,000 Load/Unload Cycles 180TB per Year Workload Rating Designed for 24/7 Surveillance Supports up to 64 HD Cameras WD AllFrame Technology Features The 4TB Purple SATA III 3.5" Internal Surveillance Hard Drive from WD is designed to withstand the stresses placed on it in a 24/7, always-on, high-definition surveillance system with 16 drive bays. With support for up to 64 high-definition surveillance cameras, this 4TB hard drive can hold a large amount of data and gives you the ability to easily upgrade and expand your security system. Furthermore, WD AllFrame technology helps improve video capturing and reduces errors, pixilation, and video interruptions that could happen in a video recorder system. A SATA III 6 Gb/s interface, sustained data transfer speeds of up to 180 MB/s, and a 256MB cache all help to ensure uninterrupted data transfers. Furthermore, the drive's 300,000 load/unload cycles, annualized workload rating of 180TB per year, MTBF rating of 1 million hours, and <1 in 1014 non-recoverable read errors per bit read also help to ensure a strong operational life. Highlights 4TB storage capacity Designed for mainstream surveillance systems WD AllFrame technology helps reduce dropped frames Supports a workload rate of up to 180TB per year Support for up to 16 bays Specifications Total Capacity 4 TB Drive Type SATA III / 3.5" HDD (rpm Unspecified) Read Speed Maximum: 180 MB/s Write Speed Maximum: 180 MB/s Total Capacity 4 TB Drive Type SATA III / 3.5" HDD (rpm Unspecified) Read Speed Maximum: 180 MB/s Write Speed Maximum: 180 MB/s Encryption Support No Mean Time Between Failures (MTBF) 1.0 Million Hours Endurance (Total Bytes Written) 180 TB Power Draw 4.7 W (Active) 4.3 W (Idle) 0.3 W (Standby) Operating Conditions 32 to 149°F / 0 to 65°C Operating Shock 30 G / 2.0 ms Storage Conditions -40 to 158°F / -40 to 70°C Dimensions 5.8 x 4 x 1" / 147 x 101.6 x 26.1 mm Weight 1.5 lb / 0.7 kg Package Weight 1.495 lb Box Dimensions (LxWxH) 8.4 x 5.5 x 2.5" Document edited in the free online HTML editor. A pro license removes this footer automatically.