SDK Hints The Possibility of an 80TB Hard Disk

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Hard drive (HDD) makers are trying hard to survive the emergence of Solid-State Drives (SSDs) by offering capacities that are simply not feasible in an SSD.

Brands like Seagate and Western Digital are both pushing to release 20TB hard disks in the next few years.

While HDD technology is way cheaper, a 20TB SSD might cost way more than a new car.

Japanese company Showa Denko K.K. (SDK), which is the world’s largest manufacturer of hard drive platter, announced that it had improved upon Heat Assisted Magnetic Recording (HAMR) technology to allow for next-generation hard drives.

The platters use all-new magnetic thin films to maximize their data density, with the goal of eventually enabling 70TB to 80TB hard drives in a 3.5-inch form factor.

HAMR works by temporarily heating the disk material making it more receptive to magnetic effects.

This in turn, allows the writing of data to smaller regions, and therefore increases the data density per platter.

Achieving such a massive increase in data density was only possible through the creation of a new type of HD media.

SDK worked out a new structure of magnetic layers combined with new ways to control temperature during production.

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Combine that with disks constructed of aluminum and thin films of Fe-Pt magnetic alloy, and you get a new platter that has “magnetic coercivity several times as high as the existing most-advanced HD media, while achieving low noise due to very small crystal grain size and optimized grain size distribution control.”

Conventional magnetic recording methods today achieve 1.14Tb per square inch, but SDK believes its HAMR technology will increase that to up to 6Tb per square inch.

Based on today’s nine platter hard drives, that means an 80TB hard drive is theoretically possible.

However, it’s not clear what storage density SDK has managed to achieve so far. So while we will get to 80TB drives, we don’t know when yet.

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