The Ultrastar He6 hard disk drive (HDD) features the HelioSeal platform, designed to provide a path for higher capacity storage and significantly low customer total cost of ownership (TCO). Leveraging the inherent benefits of helium, which is one-seventh the density of air, the drive features a 7Stac disk design with 6TB, making the high-capacity HDD a good choice for cloud storage, massive scale-out environments, disk-to-disk backup, and replicated or RAID environments. Hermetically sealed, and with a low 5.3 idle watts, a reduced weight of 640g, and running at 4-5°C cooler, the HDD features 50 percent higher capacity, 23 percent lower idle power per drive, 49 percent better watts-per-TB, and the best density footprint in a standard 3.5-inch form factor.