For some reason though, these drives are only covered with a two-year warranty. Optimizing caching and prioritizing workloads is a way to make such drives more responsive.
Keep in mind that high-capacity HDDs have a rather low random read/write performance per TB (IOPS-per-TB) and have to perform background operations. In a bid to better address desktops, Toshiba's X300 18TB hard drives feature a new stabilization mechanism to guarantee 'improved operational reliability (though Toshiba is not talking about RV sensors or top-and-bottom attached spindle here) as well as a new caching technology with optimized allocation to increase performance.