Western Digital 8TB Ultrastar DC HC320 SATA HDD – 7200 RPM Class, 256MB Cache, SATA 6 Gb/s, 3.5″


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Features

  • 24×7 continuous operation
  • Advanced format 512e
  • Dual Stage Actuator (DSA)
  • Dynamic fly height technology
  • Enhanced Rotational Vibration Safeguard (RVS)
  • HelioSeal
  • Secure Erase function

Highlights

  • Excellent random and sequential performance
  • 8TB capacity point supports traditional IT systems
  • Sustained transfer rate up to 255MB/s
  • Choice of 12Gb/s SAS or 6Gb/s SATA
  • Advanced Format 4Kn and 512e models
  • Self-Encrypting Drive (TCG SAS) options

Applications & Workloads

  • Distributed file systems, like Apache Hadoop® , to support Big Data analytics
  • Direct & Network Attached Storage (DAS & NAS)
  • RAID arrays

 

Economics and Access Speed: Key Requirements for Low Capacity HDDs in the Data Center
As 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. Designed to handle workloads up to 550TB per year, Ultrastar® DC HC320* is an 8TB1 HDD that helps address economic and access requirements of many traditional IT workloads. Low capacity drives also help address architecture limitations. The Ultrastar DC HC320 is designed for traditional storage and server applications as well as distributed and scalable computing, including block and file storage architectures, providing fast 7,200 RPM performance and lower acquisition cost to help ease budget constraints. Ultrastar DC HC320 is offered with either 6Gb/s SATA or 12Gb/s SAS interface in a choice of 512e or 4Kn formats.

Technology Innovation Delivers Efficiency and Performance for Traditional IT Systems
Ultrastar DC HC320 is based on a proven 5-disk air platform design that uses conventional magnetic recording (CMR) technology in a 3.5-inch large form factor. Compared to the prior generation, Ultrastar 7K6000, the DC HC320 delivers 33% more capacity, up to 12% performance boost and uses slightly larger-diameter media. It features a secondgeneration, dual-stage micro actuator to enhance head positioning accuracy for better drive performance. Write performance gains are also supported by Western Digital’s media cache architecture, a diskbased caching technology that provides a large cache area on the disk, which also improves reliability and data integrity during unexpected power loss. Finally, the addition of flash-based non-volatile cache (NVC) on both SATA and SAS models helps improve write performance. The Ultrastar DC HC320 also includes a Rebuild Assist feature, which helps dramatically reduce RAID rebuild times and maintain system performance during the rebuild process. Learn more in our Rebuild Assist technical brief.

Data Security with Trusted Quality, Reliability
Compliance and privacy requirements drive the need for increased data security. Ultrastar DC HC320 helps protect data from unauthorized use by offering security and encryption options. SAS models offer hardwarebased encryption options, including a Trusted Computing Group (TCG) Enterprise_A, TCG with FIPS 140-2 certification, Level 2. The Ultrastar DC HC320 extends Western Digital’s long-standing tradition of reliability leadership with a 2M-hour MTBF2 rating.

SPECIFICATION

Model Number 0B36404
Alt Model Number HUS728T8TALE6L4
Data Security Mode Secure Erase
Configuration
Interface SATA 6Gb/s
Capacity (TB) 8TB / 8,000
Form Factor 3.5-inch
Format Sector Size (bytes) 512e: 512
Max. Areal Density
(Gbits/sq. in.)
834
Performance
Data Buffer (MB) 256
Rotational Speed (RPM) 7200
Latency Average (ms) 4.16
Interface Transfer Rate
(MB/s, Max)
600
Sustained Transfer Rate
(MiB/s, Typical)
(MB/s, Typical)

Up ro 243
Up to 225

Seek Time
Read/Write, ms, Typical)
8.0/8.6
Reliability
Error Rate
(Non-Recoverable, Bits Read)
1 in 10^15
Load/Unload Cycles
(at 40°C)
600,000
MTBF
(M Hours)
2m hours
Annualized Failure Rate
(AFR)
0.44%
Availability
(Hrs/Day x Days/Week)
24×7
Acoustics
Idle/Operating (Bels, typical) 2.9/3.6
Power
Requirement +5 VDC, +12VDC
Operating (W) 8.8
Idle (W) 7.4
Physical size
z-Height (mm) 26.1
Dimensions
(width x depth, mm)
101.6 (+/- -0.25) x 147
Weight
(g, max)
715
Environmental (Operating)
Ambient Temperature 5° to 60° C
Shock
(half-sine wave 2 ms, G)
70
Vibration
(G RMS 5 to 500 Hz)
0.67 (XYZ)
Environmental (Non-Operating)
Ambient Temperature -40° to 70° C
Shock
(half-sign wave, 2 ms, G)
300
Vibration
(G RMS, 2 to 200 Hz)
1.04 (XYZ)
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