Hitachi announced to have successfully developed a new technology to increase the density of disc-based HD up to 2.5 Tbits/inch2. In theory with such figures, one could obtain 3.5" HD with storage capacity of 10 TB, in other words 2.5x more than the current perpendicular recording technologies. To reach such density, Hitachi developed new magnetic heads associated with leaser beam, able to emit a ray of only 20 nm in diameter. This laser will warm the area where data will be saved. By making magnetic particles easier to be manipulated, the surface (tracks) required would then be smaller.Hitachi does not reveal any availability for this product. Indeed, so far any HD manufacturer that tried to warn the magnetic surface with a laser before writing data on the surface had to face a major problem; the weight of the laser beam. Indeed, this mechanical part would have physical constraints making access time in reading and writing modes potentially less effective.
