Western Digital Ultrastar DC HC320 8TB SAS Hard Drive (0B36400)

Mid-capacity Drives
The Ultrastar DC HC300-series provides low to mid-capacity drives that are economical to acquire, yet deliver quick and reliable data access for traditional data center applications.

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. Part of our mid-capacity DC HC300 series, 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 512e9 format.

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 second-generation, 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 disk-based 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 nonvolatile 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.

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 second-generation, 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 disk-based 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 nonvolatile 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. Both SAS and SATA models offer hardware-based encryption options, which includes both Sanitize Crypto Scramble / Erase functionality and TCG
encryption (Trusted Computing Group, Enterprise SSC). Additionally, SAS SED is also offered as a FIPS 140–2 Level 2 certified model. The Ultrastar DC HC320 extends Western
Digital’s long-standing tradition of reliability leadership with a 2M-hour MTBF2 rating and a 5-year limited warranty

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 512e9 models
• Self-Encrypting Drive options
• 5-year limited warranty 

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

Technical Details :
Brand :  Western Digital
Model : HUS728T8TAL5204, HUS728T8TAL5201, HUS728T8TAL5205
 
Full Specifications :
Capacity : 8 TB
Interface : SAS 12Gb/s
Disk Speed (RPM) : 7200rpm
Cache Size (MB) : 256MB
Transfer Rate : up to 255MB/s
Dimensions (L x W x H) : 5.79" x 4" x 1.03"
Form Factor : 3.5-inch
Sector size (bytes) : 4Kn: 4096, 4104, 4160, 4224  512e: 512, 520, 528
Max. areal density (Gbits/sq. in., max) : 834
 

Performance
Data buffer (MB) : 256
Rotational speed (RPM) : 7200
Latency average (ms) : 4.16
Interface transfer rate (MB/s, max) : 1200
 

Sustained transfer rate5
(MiB/sec, typ.) : Up to 243
(MB/sec, typ.) : Up to 255
 

Reliability
Error Rate (non-recoverable bits read) : 1 in 1015
Load/Unload cycles (at 40°C) : 600,000
MTBF2 : 2M hours
Annual failure rate (AFRƜ : 0.44%
Availability (hrs/day x days/wk) : 24x7
Limited Warranty (yrs) : 5
 

Acoustics
Idle/Operating (Bels, typical) : 2.9 / 3.6
 

Power
Requirement : +5V, +12V
Operating (W, typical) : 12.8
Idle (W) : 8.4
 

Physical
z-height (mm, max) : 26.1 
Dimensions (width x depth, mm) : 101.6 (+/-0.25) x 147 
Weight (g, max) : 715
 

Environmental (operating)
Ambient Temperature : 5°C to 60°C 
Shock (half-sign wave, 2 ms, G) : 70 
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) 300 
Vibration (G RMS, 2 to 200 Hz) : 1.04 (XYZ)