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Western Digital Red 4TB 3.5" NAS Hard Drive - WD40EFRX

Abt Model: WD40EFRXSP | UPC Code: 718037810058
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Product Details

Western Digital Red 4TB 3.5" NAS Hard Drive, Model WD40EFRXSP


  • Expanded solutions
    Our formula of success has led growth of WD Red into higher capacities and expansion into new 2.5-inch solutions. We now offer a broader, more comprehensive portfolio of NAS hard drives for our customers. It is not just about NAS drives, it is REDvolutionary
  • Next generation experience
    Every component, line of code, and product decision was built on our passion and determination to deliver the best NAS experience.The next generation of WD Red hard drives delivers on this promise with massive capacity and NASware 2.0, which further improves drive reliability and protects your data in the event of a power loss or power disruption
  • Experienced in NAS
    In all of our cultures around the world, first impressions are what leave a mark. With superior technology that is driven to impress, WD Red is a reflection of the most extensive NAS partner compatibility-testing list that is available on the market*. That means when you buy a NAS enclosure, you can trust that WD Red will be the most compatible drive available. Our pride is in our product and our vision is shared with our customer
    • *Data reflects products in production as of August 2013
  • NAS for home
    Take your connected home environment to the next level with a NAS system that is equipped with WD Red hard drives and enjoy streaming your media, backing up your computers, file sharing and managing your digital content faster and easier. WD Red's NASware 2.0 experience with increased compatibility makes sharing from your mobile device, computer, TV, stereo and more an instant gratification. And with capacities now available in 4 TB, a 5-bay NAS system can hold close to 20 terabytes of data!
  • NAS for small business
    Increase the efficiency and productivity of your small business with WD Red hard drives for your 1 to 5 bay NAS system. WD Red comes equipped with NASware 2.0, which increases system compatibility allowing for seamless integration with your existing network infrastructure. Add value to your business by enabling your employees to quickly share their files and back up folders reliably with WD Red NAS hard drives in your NAS solution
  • Exclusive NASware 2.0 technology
    Our exclusive technology, NASware 2.0, makes WD Red thrive in the demanding small-NAS environment. By adding WD Red to your NAS system, not only is everything more efficient and reliable, you get to enjoy a REDvolutionary NAS experience
  • 3D Active Balance Plus
    Our enhanced dual-plane balance control technology significantly improves the overall drive performance and reliability. Hard drives that are not properly balanced may cause excessive vibration and noise in a multi-drive system, reduce the hard drive life span, and degrade the performance over time
  • The right choice
    The right choice for NAS, no other drive is designed specifically for home and small office NAS systems and PCs with RAID
  • Enhanced reliability
    Since your NAS system is always on, a highly reliable drive is essential. With a 35% MTBF improvement over standard desktop drives, the WD Red drive with NASware 2.0 is designed and manufactured to be a more reliable and robust solution
  • NAS compatibility
    Advanced firmware technology built into every WD Red drive, NASware 2.0 enables seamless integration, robust data protection and optimal performance for systems operating in NAS and RAID environments
  • The secret is the next-generation technology
    WD's next generation NASware 2.0 technology improves NAS storage performance by reducing common hard drive concerns in NAS systems. This includes concerns for things like compatibility, integration, upgrade ability, reliability and cost of ownership that are experienced with a hard drive designed for desktop computers
  • Longer warranty coverage
    We keep power consumption low, which keeps your NAS system happy, and your wallet too
  • Energy efficient and money saving
    We keep power consumption low, which keeps your NAS system happy, and your wallet too
  • Lower operating temperatures
    Reduce your electricity bill and carbon footprint with WD Red drives. Innovative technology reduces power consumption and lowers the operating temperature, resulting in a more reliable and affordable solution for always on 24x7 NAS environments


  • Interface: SATA 6Gb/s
  • Performance
    • Rotational Speed: IntelliPower
    • Buffer Size: 64MB
  • Transfer Rates
    • Buffer To Host (Serial ATA): 6Gb/s (Max)
  • General
    • Formatted Capacity: 4,000,787 MB
    • Capacity: 4TB
    • Form Factor: 3.5 Inch
    • User Sectors Per Drive: 7,814,037,168
  • Target Performance
    • MTBF: 1,000,000 hours
  • Shock
    • Operating Shock (Read): 65G, 2 ms
    • Non-operating Shock: 250G, 2 ms
  • Acoustics
    • Idle Mode: 25 dBA (average)
    • Seek Mode 0: 28 dBA (average)
  • Temperature
    • Operating: 32° F to 158° F
    • Non-operating: -40° F to 158° F
  • Humidity
    • Operating: 5-95% RH non-condensing
  • Vibration
    • Operating: 0.004 g²/Hz (10 to 300 Hz)
    • Non-operating: 0.05 g²/Hz (10 to 300 Hz)
    • Operating Linear: 20-300 Hz, 0.75G (0 to peak)
  • Current Requirements
    • 12 VDC
      • Read/Write: 250 mA
      • Idle: 230 mA
      • Standby: 7 mA
      • Sleep: 7 mA
    • 5 VDC
      • Read/Write: 280 mA
      • Idle: 260 mA
      • Standby: 105 mA
      • Sleep: 105 mA
    • Power Dissipation
      • Read/Write: 4.50 Watts
      • Idle: 3.30 Watts
      • Standby: 0.40 Watts
      • Sleep: 0.40 Watts
  • Operating System
    • Compatibility: Windows/Mac/Linux

Approximate Dimensions:

  • Height: 1.028"
  • Width: 4"
  • Depth: 5.787"

Approximate Weight:

  • Unit: 1.5 lbs
  • Shipping: 2 lbs

Warranty Information:

  • Manufacturer Warranty (authorized online retailer): 3 Year Limited Warranty
Key Features
4TB 5400rpm SATA III 6Gb/s Capacity/ 64MB Cache/ Engineered For 24/7 Operation And Reliability/ NASware 2.0 Technology/ 3D Active Balance Plus/ IntelliPower Rotational Speed/ Windows, Mac, Linux Compatibility
More reasons to buy the Western Digital WD40EFRX from Abt Electronics
  • Abt.com is an authorized dealer (Learn More).
  • The Western Digital WD40EFRX is Brand New.
  • The Western Digital WD40EFRX Ships in a Factory Sealed Box.
  • Abt ships this product for free!
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