WD Ultrastar DC HC520 12TB SAS 12Gb/s 7200RPM 3.5″ Enterprise HDD (HUH721212AL5204)

The WD Ultrastar DC HC520 12TB is a high-performance enterprise hard drive engineered for demanding data center environments. This 3.5-inch drive delivers exceptional storage density with 12TB capacity while maintaining enterprise-grade reliability through its 7200RPM spindle speed and SAS 12Gb/s interface for rapid data transfer rates up to 255MB/s. Built with HelioSeal technology, it operates cooler and more efficiently than traditional air-filled drives, reducing power consumption by up to 56% while delivering 2.5 million hours MTBF reliability. The drive features advanced vibration protection, making it ideal for high-density rack configurations, and includes 512MB cache for optimized performance. Designed for 24/7 operation with a 550TB annual workload rating, this enterprise-class HDD offers the perfect balance of massive capacity, energy efficiency, and bulletproof reliability for cloud storage, virtualization, and mission-critical applications where downtime is not an option.