Hitachi Deskstar 7K1000 (1 Terabyte) HDD
 

The Deskstar 7K1000 represents a milestone for Hitachi and for the hard
drive industry as a whole, as it is the first drive to offer a 1 terabyte
capacity. However, Hitachi has not simply grabbed five 200GB platters and
stuck them together to create a 1TB hard drive. Rather, there is much more
to the Deskstar 7K1000, such as its Serial ATA II interface and the massive
32MB memory buffer. This is also the first desktop Hitachi drive to feature
PMR technology (Perpendicular Magnetic Recording).

http://www.techspot.com/review/54-hi...skstar-7k1000/