Western Digital's Exclusive AllFrame Technology
All WD Purple drives are equipped with AllFrame technology, which helps reduce video frame drops and improves video recording and playback.

Enhanced Workload Ratings
WD Purple drives feature a workload rating of up to 180TB/year - up to three times that of desktop drives - to handle the unique demands of mainstream video surveillance DVR and NVR systems.

Multiple Cameras, Multiple Streams
Modern recorders now support multiple video streams per camera. WD Purple drives support up to 64 single-stream HD cameras5. With so many options, you have the flexibility to upgrade or expand your security applications in the future.

Designed for Surveillance Solutions
With an MTBF of up to 1 million hours, WD Purple drives are engineered for mainstream surveillance DVRs and NVRs that operate 24/7. With tarnish-resistant components and support in storage systems with more than eight drive bays, WD Purple drives deliver reliable operation even in harsh environments.

Wide Compatibility. Seamless Integration
WD Purple hard drives are built with compatibility in mind, so you can quickly and seamlessly add capacity to your surveillance system. With a wide range of industry-leading enclosures and chipsets supported, you’re sure to find the DVR or NVR configuration that’s right for you.

Capacity: 4TB
Form Factor: 3.5-Inch
Connector: SATA
Interface: SATA
Transfer Rate: up to 175MB/s
Recording Technology: CMR
Cache Size: 256MB
Dimensions (L x W x H): 5.79" x 4" x 1.03"
Weight: 570gms
Model Number: WD43PURZ
Operating Temperature: 0°C to 65°C
Non-Operating Temperature: -40°C to 70°C

Product Features
Engineered for mainstream surveillance systems
WD AllFrame technology delivers optimizations for write-intensive, low bit-rate, high stream-count workloads typical to mainstream surveillance applications
Supports up to 180TB/yr workload rate and up to 16 bays

Compatibility
Up to 64 HD cameras
Up to 16 drive bays
AllFrame firmware technology