uses cookies. Click here for more information. Accept
€ 358,–
€ 295,87 ex. 21% VAT

12TB Western Digital Ultrastar DC HC520 (SAS 12Gb/s) HUH721212AL5204

ordered on demand | please contact for more information
  • Enterprise/Datacenter
  • 3.5 inch 12TB Disk
  • SAS 12 Gb/s
  • 5 year warranty
ask for extra discount on higher volumes!

Product Description 0F29532

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 HC520 is an 12TB 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 HC520 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 HC520 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 HC520 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 HC520 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 supportedm 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 HC520 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 HC520 helps protect data from unauthorized use by offering security and encryption options. SAS models offer hardware-based encryption options, including a Trusted Computing Group (TCG) Enterprise_A, TCG with FIPS 140-2 certification, Level 2. The Ultrastar DC HC520 extends Western Digital’s long-standing tradition of reliability leadership with a 2M-hour MTBF rating and a 5-year limited warranty.

For more information, please visit this products webpage.


Size 3,5"
Capacity 12 TB
Type of usage Datacentre
Interface SAS (12 Gb/s)
Cache 256 MB
Rotations 7200 RPM

Did you notice a wrong specification? Please let us know.

Interface SAS 12 Gb/s
Capacity 12TB
Format: Sector size (bytes) 4Kn: 4096, 4112, 4160, 4224
512e: 512, 520, 528
Data buffer (MB) 256
Rotational speed (RPM) 7200
Interface transfer rate (MB/s, max) 1200
Sustained transfer rate (MiB/s, typical) 243
(MB/s, typical) 255
Error rate (non-recoverable bits read) 1 in 10
MTBF (M hours) 2.5
Annualized Failure Rate (AFR) 0.35%
Load/Unload cycles (at 40C) 600,000
Availability (hrs/day x days/wk) 24x7
Limited warranty (yrs) 5
Idle/Operating (Bels, typical) 2.0/3.6
Requirement +5 VDC, +12VDC
Operating(W) 9.5
Idle (W) 5.8
Power consumption efficiency at Idle (Watts/TB): 0.51
(Watts/GB) 0.0051
Physical Size
z-height (mm) 26.1
Dimensions (width x depth, mm) 101.6 (+/-0.25) x 147
Weight (g, max) 660
Environmental (Operating)
Ambient temperature 5C to 60C
Shock (half-sine wave, 2ms, G) 70
Vibration (G RMS, 5 to 500 Hz) 0.67 (XYZ)
Environmental (Non-Operating)
Ambient temperature -40C to 70C
Shock (half-sine wave, G) 150
Random Vibration (G RMS, 2 to 200 Hz) 1.04 (XYZ)

Did you notice a wrong specification? Please let us know.

Live Chat