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 0B35950, WD 4TB Ultrastar 256MB 3.5 IN SATA 6GB/s 7200RPM Enterprise Hard Drive

WD 4TB Ultrastar 256MB 3.5 IN SATA 6GB/s 7200RPM Enterprise Hard Drive


£151.49 Inc VAT

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Key Features

  • Designed for Enterprise Servers and Storage systems. Business- critical applications
  • OEM Compatibility Tested
  • Vibration Protection & Dual-stage Actuator Technology
  • 5 Year Manufacturer Limited Warranty
  • 0B35950

Stock Code: H844570 | Part No: 0B35950

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WD 4TB Ultrastar 256MB 3.5 IN SATA 6GB/s 7200RPM Enterprise Hard Drive


Drive to endure.

Ultrastar® hard drives feature up to 10 times the workload rating of desktop drives and employ advanced technologies for enterpriseclass reliability, power efficiency and performance. Designed from the ground up to be an ultra-robust storage device, Ultrastar drives are the perfect choice for your business.

Key Features

  • High Workload Rating - Delivering dependable performance to any storage environment, Ultrastar hard drives are designed with a workload rating up to 550TB per year, among the highest of any 3.5-inch hard drive.
  • HelioSeal® Technology - Featured in over 20 million shipped Western Digital hard drives, HelioSeal technology enables the highest capacities and less turbulence on large storage arrays. And now on its fifthgeneration design, HelioSeal technology is field-tested and proven to deliver high capacity, reliability, and power efficiency you can trust.
  • Enterprise-class Storage to Rely On - With up to 2.5 million hours MTBF rating, Ultrastar hard drives deliver reliability and durability, are built for yearly operation (24x7x365) within the most demanding storage environments and are backed with a 5-year limited warranty.
  • Compatibility Testing - All Ultrastar hard drives are extensively tested across a variety of popular OEM storage systems, SATA controllers, and host bus adapters to ensure ease of integration for a plug and play solution.
  • Vibration Protection - Enhanced Rotational Vibration Safeguard (RVS) technology uses sophisticated electronics to monitor the drive and correct linear and rotational vibrations in real time for improved performance versus traditional desktop drives in high vibration environments.
  • Dual-stage Actuator Technology - Ultrastar drives feature a dual-stage actuator head positioning system for a high degree of accuracy. The primary stage provides course displacement while the secondary stage uses piezoelectric motion to fine tune the head positioning to a higher degree of precision.
  • Dynamic Fly-height Technology - Each read-write head’s fly height is adjusted in real time to ensure consistent performance for reduced errors and optimized reliability.
  • 7200 RPM Class - This 7200 RPM-class hard drive delivers the fastest performance
    with the highest workload rating of any high-capacity drive from Western Digital. Ensure
    you have the most capable hard drive regardless of the application with Ultrastar hard drives.

Ultrastar Advantage

The Ultrastar family delivers a long-standing tradition of reliability leadership with MTBF ratings of at least 2M hours and a 5-year limited warranty. Ultrastar quality, capacity, power efficiency, and worldclass technical support and service help provide customers with a lower total cost of ownership. Western Digital is dedicated to providing a complete portfolio of hard drives to create environments for data to thrive.


From the Manufacturer



Drive Type Internal
Application Enterprise
Capacity 4TB
Technology Type HDD
Drive Connection SATA
Drive Size 3.5"
Cache 256 MB
Speed 7200 rpm
Warranty 5 Year Manufacturer Warranty (View More Information)

Drive Performance
Spindle Speed (rpm)7200
Buffer256 MB
General Information
ManufacturerWestern Digital Corporation
Manufacturer Part Number0B35950
Manufacturer Website Address
Brand NameHGST
Product LineUltrastar
Product Series7K6
Product ModelHUS726T4TALA6L4
Product NameUltrastar 7K6
Marketing InformationAs the industry evolves to develop purpose-built solutions for growing data storage requirements, IT managers continue to rely on lower capacity drives that are economical to acquire, yet deliver quick and reliable data access for traditional data center applications. Ultrastar 7K6 is a low-capacity HDD, with 6TB and 4TB offerings, that helps address economic and access requirements of many traditional IT workloads. Lower capacity drives also help address architecture limitations. The Ultrastar 7K6 is designed for traditional storage and server applications as well as distributed and scalable computing, including block and file storage architectures, providing economical capacities, fast 7200 RPM performance and lower $/unit acquisition cost to help ease budget constraints.
Product TypeHard Drive
Drive InterfaceSATA
Drive Interface StandardSATA/600
Device SupportedServer
Physical Characteristics
Drive TypeInternal
Drive Width3.5"
Height26.1 mm
Width101.6 mm
Depth147 mm
Weight (Approximate)715 g
Power Description
Operating Power Consumption7 W
Technical Information
Storage Capacity4 TB

Please note: Pictures are for illustration only. Please contact us if you wish to confirm the specification before ordering.


Product Reviews


WD - 0B35950
WD 4TB Ultrastar 256MB 3.5 IN SATA 6GB/s 7200RPM Enterprise Hard Drive


£151.49 Inc VAT

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