Part # : WD20PURZ
Manufacturer SKU : WD20PURZ
Brand : Western Digital
Warranty : 30-day Lin Haw warranty + 3 additional years with manufacturer

Memory storage products are final sale once packaging has been opened.

WD Purple Hard Drives: The Evolution of Surveillance Storage

WD Purple Surveillance Storage offers exclusive AllFrame technology to bring you premium reliability and peace-of-mind when installing your home or small to medium business security system.

WD Purple's exclusive firmware upgrades work with ATA streaming to reduce error pixilation and video interruptions that occur when traditional consumer desktop hard drives are incorrectly used as storage in security systems.

Unlike Consumer HDDs, WD Purple Surveillance Storage is built for 24/7, always-on, high-definition surveillance security systems that use up to eight hard drives and up to 32 cameras.

Choose a drive that is designed and engineered for home and business surveillance systems and enjoy the peace-of-mind you can only get from a surveillance-class hard drive.

  • Built for 24/7 surveillance setups
  • AllFrame™ technology for better performance
  • Designed to support up to 32 HD cameras at once in large setups

The WD Advantage:

WD puts their products through extensive Functional Integrity Testing (F.I.T.) prior to any product launch. This testing ensures these products consistently meet the highest quality and reliability standards of the WD brand.

WD also has a detailed Knowledge Base with more than 1,000 helpful articles as well as helpful software and utilities online.

WD customer support lines have longer operational hours to ensure you get the help you need when you need it. WD's toll-free customer support lines are there to help or you can access the WD Support site for additional details.


Desktop Drives vs Surveillance Class Storage
WD Purple surveillance-class storage has been tested to be compatible in a wide-range of security systems. These drives are designed to replace standard desktop drives that were not designed for the harsh 24/7 always-on, high-definition surveillance environment. Desktop drives are built to run for only short intervals and are not engineered to withstand high-temperature fluctuations and equipment vibrations found in a typical surveillance application.

Surveillance Storage For Peace-of-mind
Whether you're protecting your personal assets and loved ones or monitoring the business you worked hard to build, you can rely on surveillance-class storage built by one of the largest hard drive manufacturers in the world. WD Purple Surveillance Hard Drives are designed for high temperature, always-on, surveillance security systems to ensure reliability and quality video play back when you need it most. Experience the security of knowing you're using a surveillance–class drive designed by a leader in the hard drive industry.

Improve performance with AllFrame

WD Purple surveillance-class hard drives are equipped with AllFrame technology which works with ATA streaming to reduce frame loss, improve playback and increases the number of drive bays supported. AllFrame reduces video interruptions that commonly occur when desktop hard drives are incorrectly used as storage in security systems. Missed frames and lost footage is a serious problem when an event occurs and surveillance footage needs to be retrieved. WD Purple with AllFrame provides the confidence you should expect when it's time to play back and review critical surveillance footage.

Engineered for compatibility
 WD Purple surveillance hard drives are built for compatibility with industry-leading chassis and chip set manufacturers for seamless integration into your new or existing video surveillance system.

Optimized Performance For Up To 32 HD Cameras:

WD Purple hard drives are optimized to support up to 32 high-definition surveillance cameras, giving you the flexibility to upgrade and expand your security system.

When WS Purple HDDs are tested against the competition in a high workload 32 Camera environment, you experience a significant increase in commands completed and also see a large increase in HDD efficiency (idle percentage) over the the competition.

Choose a drive that is designed and engineered for home and business surveillance systems and enjoy the peace of mind you can only get from a true Surveillance Class Hard Drive.

Lower power consumption
Low power consumption is crucial in high-temperature always-on surveillance environments. With exclusive IntelliSeek™ technology, WD Purple drives calculate the optimum seek speeds which lowers power consumption, noise and vibration that can damage and cause drives to wear out more quickly. When you invest in a premium surveillance-class drive you worry less while enjoying the benefits over a longer period of time.

WD Purple Storage Is Ideal For:

  • Security systems that want 24/7 surveillance reliability Surveillance security systems using PVR, DVR, NVR recorders
  • Security applications that require reduced error pixilation and video interruptions
  • Surveillance-class storage performance that use up to five hard drives and up to 32 cameras


WD Purple Storage Drives are specifically designed for Surveillance security systems using PVR, DVR, NVR recorders that use up to eight hard drives and up to 32 cameras at once.


Model WD20PURX
Formatted Capacity 2TB1
Interface SATA III, 6 Gb/s maximum
User Sectors Per Drive 3,907,029,168
Rotational Speed IntelliPower controlled RPM
Buffer Size 64MB
Load / Unload 300,000 Cycles
Read Errors Less than 10 non-recoverable bits per 1014 bits read
Operating 65G, 2ms Read
30G, 2ms Read / Write
Non-operating 250G, 1ms
Acoustics Idle: 23dBA
Seek Mode: 24dBA
Temperature Operating: 0 ~ 65° C (32 ~ 149° F)
Non-Operating: -40 ~ 70° C (-40 ~ 158° F)
Power Input 12Vdc
Power Usage Typical Read / Write: 4.4W
Idle: 4.1W
Standby & Sleep Modes: 0.6W
Dimensions & Weight  
Dimensions 101.6 x 147.0 x 26.1mm (4.0 x 5.787 x 1.028")
Weight 640g (1.40 lb)

Memory Size