WD Ultrastar 10TB 256MB – WUS721010ALE6L4

SKU: 0B42266

Out of stock


Out of stock

Image result for WUS721010ALE6L410TB | 7200 RPM | 12Gb/s SAS or 6Gb/s SATA

TCO and Access Speed: Key Requirements for HDDs in the Data Center

As the industry evolves to deploying purpose-built solutions for growing data storage requirements, IT managers can rely on higher capacity HDDs to drive lower $/TB, yet require quick and reliable data access for data center applications. The Ultrastar® DC HC330 10TB¹ hard drives help address these requirements by delivering high capacity storage with nearly 40% performance boost on low queue depth random writes over our prior generation 10TB HDD². This performance boost helps enable capacity scaling and unlocks lower Total Cost of Ownership (TCO). The Ultrastar DC HC330 HDD is designed for a variety of applications including traditional storage arrays, rack-mounted storage enclosures and server based distributed storage systems. The Ultrastar DC HC330 provides fast 7,200 RPM spindle speeds and is offered in either 6Gb/s SATA or 12Gb/s SAS interface.


  • 10TB capacity point supports both OEM and cloud deployments
  • Advanced Format models
  • Self-Encrypting Drive options
  • 3-year limited warranty


Expanding our Ultrastar HC300 Family to 10TB

The Ultrastar DC HC330 is based on a proven and cost-efficient air-based HDD platform design utilizing six disks and conventional magnetic recording (CMR) technology in a 3.5-inch large form factor. Compared to our prior 10TB product, the DC HC330 delivers the same capacity while using fewer disks. It leverages common hardware and firmware from the existing DC HC300 family of 4TB, 6TB and 8TB capacities and features a

second-generation, dual-stage micro actuator to enhance head positioning accuracy for better drive performance. Write performance gains over the prior 10TB are enabled by an improved media cache architecture, that incorporates a flash backed DRAM cache in addition to the existing disk based caching technology that provides a large cache area on the disk media.

Applications and Workloads

  • Distributed file systems, like Apache Hadoop®, to support Big Data analytics
  • Rack-mounted storage enclosures
  • Server based distributed storage systems
  • Direct and Network Attached Storage
  • (DAS and NAS)
  • RAID arrays

Data Security with Trusted Quality, Reliability

New government regulations on data privacy and security requirements drive the need for increased security features on storage devices. The Ultrastar DC HC330 helps protect data from unauthorized use by offering security and encryption options. Both SAS and SATA models offer hardware-based encryption options, which include both

Sanitize Crypto Scramble / Erase functionality and TCG encryption (Trusted Computing Group, Enterprise SSC). Additionally, a FIPS 140–2 Level 2 verified model will be offered for SAS configurations. The Ultrastar DC HC330 extends Western Digital’s long-standing tradition of reliability leadership with a 2M-hour MTBF³ rating, workloads up to 550TB per year, and a 5 year limited warranty.

Features and Benefits

Feature / Function


Capacity •  10TB

•  Advanced Format

•  Mid capacity point for both traditional IT storage arrays and Cloud server based distributed storage

•  Enables higher capacity and reliability

Performance •  Non-volatile cache (NVC)

•  Up to 262MB/s transfer rate

•  Improved write performance and write splice protection

•  Higher performance, more cost-efficient air HDD than previous 10TB helium version with up to 40% performance improvement on low queue depth random writes

Reliability •  Dual-stage Micro Actuator

•  2M hours MTBF and 0.44% AFR

•  3-year limited warranty

•  Better head positioning and rotational vibration robustness

•  One of the highest reliability ratings for air-filled Capacity Enterprise HDDs




Configuration SATA Models
Model # WUS721010ALE6L4
Interface SATA 6Gb/s
Capacity1 10TB
Form Factor 3.5-inch
Sector size (bytes) 512e: 512 4Kn: 4096
Max. areal density
(Gbits/sq. in., max)


Data buffer (MB)4 256
Rotational speed (RPM)  7200
Latency average (ms) 4.16
Interface transfer rate (MB/s, max) 600
Sustained transfer rate5
(MiB/sec, typ.) (MB/sec, typ.)
Up to 250

Up to 262


Error Rate (non-recoverable bits read)  1 in 1015
Load/Unload cycles (at 40°C) 600,000
MTBF2 2M hours
Annual failure rate (AFR)2 0.44%
Availability (hrs/day x days/wk) 24×7
Limited Warranty (yrs) 3


Idle/Operating (Bels, typical) 3.4/3.8


Requirement +5V, +12V
Operating (W, typical) 7 9.2
Idle (W)8 8.0


z-height (mm, max) 26.1
Dimensions (width x depth, mm) 101.6 (+/-0.25) x 147
Weight (g, max) 750

Environmental (operating)

Ambient Temperature 5°C to 60°C
Shock (half-sign wave, 2 ms, G) 70/50
Vibration (G RMS, 5 to 500 Hz) 0.67 (XYZ)

Environmental (non-operating)

Ambient Temperature -40°C to 70°C
Shock (half-sign wave, 2 ms, G) 250
Vibration (G RMS, 2 to 200 Hz) 1.04 (XYZ)

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