
Rather than use a traditional magnetic read/write head, the new development uses a hybrid of magnetic and optical technology to greatly increase the density: while the storage itself is similar, media is written to disk using a laser.
The extremely small, precise nature allows it to fit far more bits of data on any given area.
A full terabit (125GB) can fit on a single square inch -- five times the space of conventional hard disks, Sony says. The gain should result in notebook hard disks that store as much as 150 hours of HD-grade video and would translate to a 1.6TB hard drive using the same design as today's 320GB hard disks.











