Do Not Try This At Home: Increase Drive Capacity Using Salt

Do Not Try This At Home: Increase Drive Capacity Using Salt

Do Not Try This At Home: Increase Drive Capacity Using Salt

The cost per gigabyte has been dropping steadily. As little as five years ago, a 500 GB hard drive was considered an excessive amount of storage for any organization but the Library of Congress. “How will my application ever fill that much space?” we asked.

And yet, here we are in 2011 with our two TB drives full. It’s not just a matter of increasing capacity, however; larger drives do actually require larger housings, because there’s only so much storage density you can pack on a platter (or a flash chip, for SSD users). In traditional spinning platter drives, additional platters are needed to increase capacity beyond a certain point. This, in turn, increases the height of the drive. For space-constrained applications (which many embedded applications are), there is not a lot of room to grow. Certain 1-U rackmount cases, for instance, will have a hard time accommodating taller drives, and most hot-swap trays aren’t set up to accept unusually-sized drives.

Enter household table salt. In a brilliant move or possibly an accident that proves it’s OK to eat in the lab despite OSHA warnings, a Singapore research team led by Dr. Joel Yang have refined a process for increasing hard drive density sixfold. The secret ingredient? You guessed it: sodium chloride.

It’s a simple and elegant solution, really. The inclusion of salt crystals in solution during the lithography process of platter manufacturing causes the bit cells to align in a more regular and dense fashion, amplifying capacity from 0.5 Terabits/in2 to 3.3 Terabits/in2.

For more details, read the Singapore Agency for Science, Technology, and Research’s press release. Thanks to the good folks at The Register for spreading the word.

One Comment

  1. November 5, 2011

    The Intel D525MW board may not have an electrical problem after all. The problem may be in the bios where the hard drive delay is specified. Try putting in a delay of or 10 msec. I found this out by buying a Zalman ssd drive and discovering that Zalman needs a delay of 5 msec., and then things work more or less easily on startup.

    (This just switched into Hebrew or something, and I had to reset it.)

    Also, the latest development work on adobe flash and Intel provides for an /etc/adobe/mms.cfg file that tells the flash plugin to use the crystalhd card that you sell.

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