Travelstar 5K1000 is a 5400 RPM, 500GB/platter, 2.5-inch hard drive available in 640GB, 750GB & 1TB models. This standard 9.5mm, two-disk design, intended for use in notebook PCs, external storage, gaming consoles & other mobile applications, leverages Advanced Format, which increases the physical sector size on hard drives from 512 bytes to 4096 (4K) bytes to increase drive capacities & improve error correction capabilities. The Travelstar 5K1000 is the first 1TB 2.5-inch HDD with a 6 Gb/s SATA interface & delivers best-of-breed 5400 RPM performance in PCMark 7 & PCMark Vantage testing. The 5K1000 continues to demonstrate Hitachi's ecological leadership with its halogen-free design & power-efficient operation, & carries the Eco Trac classification. Travelstar 5K1000 delivers the highest mobile capacity with excellent performance to meet the needs of consumers & commercial users in an eco-friendly, rugged design.