HGST delivers the world's first hermetically sealed, helium hard drive, the Ultrastar & reg He6 for massive scale-out environments. Why does helium make a difference? Helium has only one-seventh the density of air. Replacing air with helium inside a hard drive dramatically reduces the turbulence caused by the spinning disk, cuts power consumption and results in a lower temperature within the disk drive.The reduction in turbulence for the spinning disk allows HGST to offer a seven-disk design in a traditional 3.5-inch form factor. In addition to being the world's first helium-filled hard drive, HGST Ultrastar He6 is also the first hard drive in the industry to offer a 6-terabyte capacity. This design delivers a 50% capacity gain and still reduces the energy needed to run the drive by up to 23%. Trust the drives trusted by world's major cloud service providers and massive 24/7/365 online transaction processing (OLTP) environments. With the industry-leading reliability warranty, the Ultrastar He6 lays the foundation for worry-free data storage. The world's first drive to include HelioSeal technology in the drives lets you store more data than traditional air-filled drives: Helium in the drives allows HGST to put more platters in the same size enclosure; increasing drive capacity. The innovative HelioSeal innovation in the UltrastarHe6 reduces your TCO because the drives needs less power to operate and cool than air-filled drives. For quality, reliability at a low TCO, trust your data center to HGST