WD Purple drives are designed to meet the challenges of 24x7 video surveillance recording. These drives are engineered specifically for surveillance to help withstand the elevated heat fluctuations and equipment vibrations within NVR environments. An average desktop drive is built to run for only short intervals, not the harsh 24/7 always on environment of a high-definition surveillance system. With WD Purple drives, you get reliable, surveillance-class storage that’s tested for compatibility in a wide range of security systems. Exclusive WD AllFrame technology helps reduce frame loss and improve overall video playback.

Industry-Leading Storage. Surveillance You Can Trust.
Western Digital has provided surveillance-grade storage for more than a decade. With WD Purple surveillance storage, drives are engineered for high temperature, always on surveillance systems so you can rely on quality video when you need it most. WD Purple delivers smart video storage that you can trust and are backed by a 3-year limited warranty.

Western Digital’s Exclusive WD 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. Select WD Purple drives support up to 64 single-stream HD cameras, and can also support many of the latest cameras that transmit multiple streams to enable basic AI functionality. With so many options, you have the flexibility to upgrade or expand your security applications in the future.

Designed for Today's and Tomorrow's Surveillance Solutions
Engineered for reliability with an MTBF of up to 1 million hours and backed with a 3-year limited warranty, WD Purple drives feature tarnish-resistant components and support for storage systems with up to 16 drive bays. WD Purple hard drives are designed with RAID error recovery control to help reduce failures in supported video recorders.

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.

Warranties - Returns:
Money Return:	Repair - Replacement:
20 days	36 months

Specifications
Formatted capacity	4TB
Form factor	3.5-inch
Advanced Format (AF)	Yes
Recording Technology	CMR
RoHS compliant	Yes
Product Features
Cameras supported	Up to 64 HD
Drive Bays Supported	16
Firmware Feature Name	AllFrame
Tarnish resistant componets	Yes
RV Sensors	Yes
Performance
Interface transfer rate (max) Buffer to host Host to/from drive (sustained)	- 6 Gb/s 180MB/s
Cache (MB)	256
Reliability/Data Integrity
Load/unload cycles	300,000
Annualized workload rating	180TB/yr
Non-recoverable read errors per bits read	<1 in 10^14
MTBF	1,000,000
Limited warranty (years)	3
Power Management
Average power requirements (W) Read/Write Idle Standby and Sleep	4.7 4.3 0.3
Environmental Specifications
Temperature (°C, on the base casting) Operating Non-operating	0 to 65 -40 to 70
Shock (Gs) Operating (2 ms, read/write) Operating (2 ms, read) Non-operating (2 ms)	30 65 250
Acoustics (dBA) Idle Seek (average)	23 27
Physical Dimensions
Height (mm, max)	1.028/26.1
Length (mm, max)	5.787/147
Width (/mm, ± .01 in)	4/101.6
Weight (kg, ± 3%)	1.26/0.57