Leapfrog's Seagate's recent 8TB HDD announcement. Western Digital subsidiary HGST has announced that it has started shipping 8TB Ultrastar He8 HDDs and begun sampling 10TB capacity drives to add to the range. These drives are the second generation Helium filled devices from HGST. Last November it managed to produce 6TB drives with its first generation technology.

HGST claims that its Helium filled drives are the best choice for high-capacity, high-reliability and performance. Its hermetically sealed 'HelioSeal' technology will thus be the cornerstone of all future high capacity HDDs coming from the company. The use of the inert gas is said to bring additional benefits of "significantly lowering power consumption" and cooling requirements.

However Seagate beat it to the punch by managing to produce an 8TB hard drive last month; "Seagate scoffs at Helium," reported ComputerWorld at the time. Seagate still uses air within its drives but thanks to shingled magnetic recording (SMR) technology it is expected to create drives of capacities approaching 20TB by 2020. The 'shingled' term refers to how data tracks overlap on a platter like shingles on a roof. That helps boost bit density. Seagate still has the option of using a gas other than just air in the future.