Ultrastar DC HC300-series are based on a proven and cost-efficient air-based HDD platform design, with Conventional Magnetic Recording (CMR) technology in a 3.5-inch large form factor.  These HDDs leverage common hardware and firmware while featuring a second-generation, dual-stage microactuator to enhance head positioning accuracy for better drive performance.  Write performance gains are also supported by Western Digital’s media cache architecture, a disk-based caching technology that provides a large cache area on the disk, improving reliability and data integrity. 
Up to 2.5M hours MTBF with a 5 year warranty
Five generations of HelioSeal technology (10TB and above)
Rotational Vibration Safeguard (RVS) technology for vibration protection