Since the development and eventual consumer release of Perpendicular Drive technology some 6 years ago, which has resulted in ever increasing capacities and lower and lower costs, the search has been underway for the 'next big thing' in cramming more and more magnetic bits into a smaller and smaller space.
One of the leading technologies out there right now is:
http://www.engadget.com/2011/10/17/s...il-unfriendly/
Probably just like Perpendicular recording spurred advances in read/write head technology, this will probably require similar changes, but it's something to keep an eye on.
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