Yes, it is a 6TB hard drive that has been filled with helium and it is claimed to be the first ever helium-filled hard drive. The HDD has been announced by HGST and it comes in 3.5″ size designed to take its place in desktop computers as well as in storage stations.
According to HGST, the new helium filled 6TB hard drive will operate at lower temperatures and are designed to consume comparatively low power. The Helium Hard drives have SATA 6.0 Gbps interface and have 64MB memory buffer. These have a spindle speed of 7200 RPM.
With MTBF of about 2 million hours, the HGST 6TB Helium Hard drives have already started shipping.