Western Digital Purple 4TB 3.5" Internal Hard Drive

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Western Digital
  • Form Factor: 3.5 Inches
  • Interface: Serial ATA
  • Capacity: 4 TB
  • Cache: 64 MB
  • Spindle Speed: Intellipower

ID: 5349



Western Digital Purple 4TB 3.5" Internal Hard Drive - WD40PURX

WD Purple Surveillance Storage offers exclusive AllFrame technology to bring you premium reliability and peace-of-mind when installing your home or small-medium business security system. WD Purple's exclusive firmware upgrades work with ATA streaming to reduce error pixilation and video interruptions that occur when desktop hard drives are incorrectly used as storage in security systems. 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.

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 surveillance environment. WD Purple drive use IntelliSeek technology to calculate seek speeds and maintain lower power consumption, a crucial feature in high-temperature, always running surveillance environments. Desktop drives are built to run for only short intervals and are not engineered to withstand high-temperature fluctuations and equipment vibrations found in typical surveillance applications.

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.

Key Benefits of AllFrame:

  • Reduces video frame loss with surveillance-class storage.
  • Specifically tuned for surveillance security systems.
  • Caching algorithms are tuned for write-intensive, low bit rate, high stream count applications that are typical of surveillance applications.
  • Priority change for write allocations and preemptive caching policies.
  • TLER & ATA streaming support.
  • Supports up to eight drives.


  • IntelliPower rotational speeds
  • SATA 6 GB/s
  • 64MB cache
  • 3 Year Warranty

Note: WD Purple is not recommended for use in NAS environments, please consider using WD Red hard drives for desktop RAID and NAS environments or WD datacenter hard drives for rackmount or large RAID configurations.

ID: 5349 BRAND: Western Digital PART NUMBER: WD40PURX Category:

Technical Specifications

Brand Western Digital
Product Type Internal Hard Drives
Model Purple 4TB 3.5" Internal Hard Drive
Part Number WD40PURX
Form Factor 3.5 Inches
Sustained Data Transfer Rate
Max Data Transfer Rate
Interface Serial ATA
Capacity 4 TB
Cache 64 MB
Spindle Speed Intellipower

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