The Western Digital WD Purple WD64PURZ is a 3.5-inch hard drive specifically engineered for the demanding needs of 24/7 surveillance systems. With a 6 TB capacity, it provides ample space for high-definition footage, supporting up to 64 HD cameras and operating efficiently in setups with up to 16 drive bays. The drive utilizes CMR recording technology and a 256 MB cache to maintain a sustained transfer rate of up to 175 MB/s, ensuring that data flows smoothly during continuous recording. To prevent the frustration of missing moments, this drive features AllFrame technology, which reduces frame loss and improves playback quality. It is built for longevity and reliability, boasting a workload rating of 180 TB per year and an MTBF of up to 1 million hours. The internal components are tarnish-resistant, allowing the unit to operate reliably in temperatures ranging from 0°C to 65°C. Weighing 570 g and utilizing a SATA III interface, it fits seamlessly into professional security arrays where write-intensive workloads are the norm.