Western Digital Ultrastar DC HA340 4TB Data Center CMR Hard Drive, SATA 6Gb/s, 7200 RPM | WD 0B47076

The Western Digital Ultrastar DC HA340 4TB hard drive delivers reliable storage performance engineered specifically for data-intensive enterprise workloads. Built on a field-proven air-based HDD platform, this 3.5-inch SATA drive combines a 7200 RPM rotational speed with a 256MB data buffer to offer high access density and strong IOPS performance. It is designed for seamless integration into 24/7 environments, including cloud infrastructures, high-performance computing (HPC), converged systems, and AI training pools. Advanced technologies like Dynamic Fly Height protect the drive against operational shock, ensuring long-term durability in demanding data centers. 4TB capacity on a proven 3.5-inch air-filled enterprise storage platform SATA 6Gb/s interface supporting 512e format 7200 RPM performance with 4.16 ms average latency 256MB onboard data buffer for improved caching efficiency Sustained transfer rates up to 267 MB/s (255 MiB/s) 154 Random Read IOPS and 425 Random Write IOPS (4K, QS16) Rotational Vibration Safeguard (RVS) technology for dense chassis environments 2,000,000-hour MTBF rating with 0.44% projected Annualized Failure Rate (AFR) Engineered for 24/7 availability and up to 600,000 load/unload cycles 5-year limited manufacturer warranty Data Sheet