- Description
- Specifications
Western Digital Ultrastar DC HA340 12TB SATA/600 Data Center Hard Drive with CMR Technology, 7200 RPM, 512 MB Buffer, Rotational Vibration Sensors, and 228-Year MTBF for Server and Storage System Deployments
The Western Digital Ultrastar DC HA340 WUS721212BLE6L4 (0B47063) is a 12TB data center SATA hard drive that delivers 7200 RPM spindle performance, 512 MB buffer, and SATA/600 interface speed with Conventional Magnetic Recording (CMR) technology in a standard 3.5-inch form factor. The DC HA340 is a medium-capacity air-filled enterprise drive designed for data-intensive applications that require high IOPS density, delivering 150,000 random 4K read IOPS and 465,000 random 4K write IOPS with a 228.2-year MTBF rating for continuous 24/7 data center operation.
Built-in Rotational Vibration (RV) sensors proactively counteract disturbances from adjacent drives in dense storage enclosures, and multi-axis shock sensors with dynamic fly height technology maintain performance and protect data during subtle shock events. The 512e disk format provides sector-level compatibility with Windows, Windows Server, and Linux operating systems, and the CMR recording method provides consistent write performance without the rewrite penalties of SMR (Shingled Magnetic Recording) drives. At 1.65 lb in a standard 3.5-inch chassis with 700 mW standby power, the DC HA340 installs in any server or storage system that accepts standard LFF drives.
Where the WD Ultrastar DC HA340 12TB Fits
- Data center storage tiers with high IOPS requirements where the 150,000 read IOPS and 465,000 write IOPS deliver the access density that data-intensive applications need, the 12TB capacity provides strong storage per bay for medium-density deployments, and the CMR technology avoids the write amplification and performance variability of SMR drives
- Dense server and JBOD storage enclosures where the built-in RV sensors maintain consistent performance when multiple drives create vibration in shared chassis, the multi-axis shock sensors protect data during rack-level disturbances, and the 228.2-year MTBF rating provides the reliability that large drive fleets require for predictable replacement rates
- Mixed-workload server and storage system deployments where the SATA/600 interface provides broad controller compatibility without SAS infrastructure requirements, the 512 MB buffer absorbs burst writes for smoother application response, and the 7200 RPM spindle handles simultaneous read/write workloads with consistent latency across Windows Server and Linux environments
What the WD Ultrastar DC HA340 12TB Delivers
- 12TB Data Center SATA: 12TB capacity with SATA/600 interface. CMR recording technology for consistent write performance. 512e disk format. Compatible with Windows, Windows Server, and Linux.
- High IOPS Performance: 150,000 random 4K read IOPS. 465,000 random 4K write IOPS. 7200 RPM spindle speed with 512 MB buffer. 228.2-year MTBF rating.
- 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 data center operation.
- 3.5-Inch Form Factor: Standard 3.5-inch LFF chassis at 4 x 5.8 x 1 inches. 1.65 lb. 700 mW standby power consumption. Compatible with server and storage system drive bays.
