40TB in a 3.5″ Drive

Western Digital is harnessing the power of microwaves to create denser drives:

If you’re wondering what microwaves have to do with hard drives, WD has a developed a new type of drive head called a “spin torque oscillator” that generates a microwave field. That allows data to be written to magnetic media at a lower magnetic field than with conventional disks, making it possible to pack more bits into the same space.

“As a result, Western Digital’s MAMR technology is now ready for prime time, and provides a more cost-effective, more reliable solution,” the company said in a technical brief, adding that “MAMR also has the capability to extend areal density gains up to 4 Terabits per square inch.” As with its current enterprise drives, WD’s MAMR drives will use helium instead of air to reduce internal turbulence.

The first MAMR drives are scheduled to be available in 2019 with a 3.5″ 40TB drive by 2015.

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