HGST's Ultrastar C10K1800 mechanical drive caches data on its platters

SSDs dominate the headlines in the storage industry, but every so often, a new mechanical drive catches our eye. Today, it's HGST's Ultrastar C10K1800, which crams 1.8TB into a 2.5" form factor. That storage density isn't terribly remarkable by itself, but the Ultrastar spins its platters at 10,000 RPM, which is a lot faster than most HDDs. It also has a novel "media cache architecture" that uses a portion of the platters as a drive cache. Oooh.