- Description
- Specifications
Western Digital Ultrastar HC555 12TB SAS Data Center Hard Drive with Energy-Assisted Magnetic Recording, HelioSeal Helium Technology, Triple-Stage Actuator, and 285-Year MTBF for High-Intensity 24/7 Data Center Workloads
The Western Digital Ultrastar HC555 WUH722012CL5204 (0B47741) is a 12TB helium-filled enterprise SAS hard drive that delivers 7200 RPM performance, 512 MB buffer, and Energy-Assisted Magnetic Recording (EAMR) technology in a standard 3.5-inch form factor for 24/7 multi-user data center environments. The HC555 uses Western Digital's HelioSeal helium technology to reduce internal turbulence and power consumption, while the Triple-Stage Actuator (TSA) increases tracks-per-inch density for greater capacity with precise head positioning and lower power draw.
Built on a platform deployed in thousands of data centers worldwide, the HC555 delivers a 285.2-year MTBF rating for predictable reliability at scale. Built-in Rotational Vibration (RV) sensors counteract disturbances from adjacent drives in dense storage enclosures, and multi-axis shock sensors with dynamic fly height technology protect data during rack-level events. The 512e disk format provides compatibility with Windows, Windows Server, and Linux operating systems, and the SAS interface provides dual-port connectivity for multipath I/O in high-availability storage architectures.
Where the WD Ultrastar HC555 12TB Fits
- High-intensity 24/7 data center storage tiers where the EAMR recording technology enables higher areal density with proven reliability, the 285.2-year MTBF provides predictable failure rates for large drive fleet management, and the HelioSeal helium technology delivers lower power consumption per terabyte than air-filled enterprise drives
- Dense multi-drive server and JBOD enclosures where the built-in RV sensors and multi-axis shock sensors maintain consistent performance when multiple drives create vibration in shared chassis, the SAS interface supports dual-port multipath I/O for high-availability controllers, and the TSA provides precise head positioning in vibration-prone environments
- Cloud, hyperscale, and distributed storage architectures where the 12TB capacity provides a balance of density and cost per bay for block and file storage workloads, the 7200 RPM spindle with 512 MB buffer handles mixed read/write enterprise workloads, and the field-proven platform enables rapid qualification and seamless integration into existing infrastructure
What the WD Ultrastar HC555 12TB Delivers
- 12TB Helium Enterprise SAS: 12TB capacity with SAS interface. EAMR recording technology for higher areal density. HelioSeal helium technology for lower power and turbulence. 512e disk format.
- 7200 RPM with TSA: 7200 RPM spindle speed with 512 MB buffer. Triple-Stage Actuator for precise head positioning and higher TPI. 285.2-year MTBF rating for enterprise reliability.
- Vibration and Shock Protection: Built-in RV sensors for dense multi-drive enclosures. Multi-axis shock sensors with dynamic fly height technology. Designed for continuous 24/7 multi-user data center operation.
- 3.5-Inch Form Factor: Standard 3.5-inch LFF chassis at 4 x 5.8 x 1 inches. Compatible with Windows, Windows Server, and Linux. Dual-port SAS for multipath I/O.
