Western Digital's subsidiary, HGST, has started shipping its helium-filled hard disk drive. The Ultrastar He6 is a 6TB HDD. It is also considered the highest capacity 3.5-inch drive sold in the market, today. HGST makes use of a "hermetic seal technology" which makes it impossible for helium to leak through the HDD's seals. According to HGST helium ""dramatically reduces the turbulence caused ...