The Deskstar 5K1000.B hard drive provides 1TB of capacity in a single-disk design and features innovative CoolSpin technology to deliver a new level of power efficiency and quiet operation for energy-conscious, environmentally friendly computers. This 1TB/platter hard drive uses Advanced Format, which increases physical sector size from 512 bytes to 4096 (4K) bytes, thereby increasing capacities and error correction capabilities. Consult the Hitachi Advanced Format Technology Brief for more information on these drives. CoolSpin technology is an optimization of motor speed to provide an ideal balance of performance, power utilization and acoustics. With low power, capacity and cool operation, the 3.5-inch Deskstar 5K1000.B enables a new generation of personal computers.