Toshiba Tests Super High Density 2.5Tb Tech
 

With its bit-patterned prototype, Toshiba said that it has achieved a density of 2.5 terabits per square inch. This is way ahead of what's available on current drives, which top out at 541 gigabits per square inch.

It'll be a while before we see drives based on this technology, however, as Toshiba doesn't see these hitting the market before 2013

http://www.tomshardware.com/news/ter...l#xtor=RSS-181