Helium Drives

          Helium-filled hard drives have lately been pushing the capacity boundaries of hard drives, which are typically filled with air. By using helium instead of air, helium-filled drives use less power to spin the disks Because helium is one-seventh as dense as air, the spinning platters in a helium drive encounter less resistance and experience almost no turbulence. they run cooler, and they can pack in more disks. Still, these high performance drives will likely only get cheaper and even more expansive–perhaps affordable enough even for consumer use.

So far, this product is commercialized by the HGST and Seagate company.

           It took some time for helium drives to move from concept to reality because it was difficult to prevent the helium from leaking out of the drives. Now, HGST and Seagate both have helium drives currently on the market, and HGST reports that of the one million helium drives it shipped in the first year of production, none experienced seal failure in the field.  Seagate helium drives have a lower cost per GB, however), the technology is still expensive. Still, these high performance drives will likely only get cheaper and even more expansive–perhaps affordable enough even for consumer use.

For further information about Helium Drives

Additional info :

In an attempt to build higher-capacity, energy-efficient hard drives, a few manufacturers have come up with a novel solution which is filling the hard drive case with helium.

As a result, manufacturers can put more platters into a drive and track data on those platters more precisely, greatly increasing drive density. It also decreases energy use, makes the drive quieter and improves reliability.