- Description
- Specifications
Western Digital Ultrastar DC HC560 20TB SAS Data Center Hard Drive with OptiNAND Technology, Energy-Assisted Magnetic Recording, Triple-Stage Actuator, HelioSeal Helium, and CMR Format for Maximum-Capacity Enterprise Storage
The Western Digital Ultrastar DC HC560 WUH722020BL5204 (0F38652) is a 20TB helium-filled enterprise SAS hard drive that delivers 7200 RPM performance with OptiNAND technology, Energy-Assisted Magnetic Recording (EAMR), and a Triple-Stage Actuator (TSA) on a 9-disk platform achieving 2.2TB per platter in a standard 3.5-inch form factor. OptiNAND integrates an iNAND Universal Flash Storage embedded flash drive with the spinning disk media and enhanced firmware algorithms to offload metadata to flash, enabling higher tracks per inch and greater areal density without changing the CMR recording format.
The 20TB capacity on a 12Gb/s SAS interface provides dual-port connectivity for multipath I/O in high-availability storage architectures, while the 4Kn disk format aligns with modern enterprise storage controller requirements. The EAMR recording technology improves writability for increased areal density, and the TSA enhances head-positioning accuracy for both performance and capacity gains. HelioSeal helium technology delivers a lower power profile per terabyte than air-filled drives, and the 5-year limited warranty supports long-term procurement planning for large fleet deployments.
Where the WD Ultrastar DC HC560 20TB Fits
- Hyperscale cloud and data center environments maximizing storage density where the 20TB capacity delivers the highest density per drive bay available in the Ultrastar lineup at the time of release, the OptiNAND technology enables capacity gains through flash-enhanced firmware without moving away from proven CMR recording, and the 9-disk platform with 2.2TB per platter reduces the total drive count needed per petabyte of raw storage
- High-availability SAN and JBOD storage arrays where the 12Gb/s SAS interface supports dual-port multipath I/O for controller failover without data path interruption, the TSA provides precise head positioning for consistent performance in vibration-prone multi-drive enclosures, and the HelioSeal helium environment maintains lower power consumption and operating temperature at scale
- Enterprise archive, content delivery, and bulk storage platforms where the 20TB capacity per bay directly reduces rack space, power, and cooling infrastructure costs compared to lower-capacity drives, the CMR format provides consistent write performance for mixed enterprise workloads, and the 5-year warranty and Ultrastar DC platform enable rapid qualification and long-term fleet planning
What the WD Ultrastar DC HC560 20TB Delivers
- 20TB OptiNAND Enterprise SAS: 20TB capacity with 12Gb/s SAS interface. OptiNAND technology with integrated iNAND UFS flash. EAMR recording for higher areal density. CMR format. 4Kn disk format. 9-disk platform at 2.2TB per platter.
- 7200 RPM with TSA: 7200 RPM spindle speed. Triple-Stage Actuator for precise head positioning. 212 IOPS random read, 565 IOPS random write (4KB). Designed for sustained 24/7 enterprise workloads.
- HelioSeal Helium Technology: Sealed helium environment for lower power consumption per terabyte. Reduced internal turbulence for consistent performance. Lower operating temperature in dense multi-drive enclosures.
- 3.5-Inch Form Factor: Standard 3.5-inch LFF chassis at 4 x 5.8 x 1 inches. Dual-port SAS for multipath I/O. 5-year limited warranty. Drop-in compatible with enterprise SAN, JBOD, and server platforms.
