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Ultrasound Waves Used To Increase Data Storage Capacity of Magnetic Media
Lucas123 writes "Electrical engineers at Oregon State University (OSU) said yesterday that they have found a technique to use high-frequency sound waves to improve magnetic data storage.The data write-technology breakthrough could allow greater amounts of data to be stored on both hard disk drives and NAND flash-based solid-state drives (SSDs), they said. Typically, when magnetic recording material is temporarily heated, even for an instant, it can become momentarily less stiff and more data can be stored at a particular spot. But, the technique has proven difficult to effectively increase capacity because heating tends to spread beyond where it is wanted and the technology involves complex integration of optics, electronics and magnetics, the researchers said. With the new technique, known as acoustic-assisted magnetic recording, ultrasound is directed at a highly specific location on the material while data is being stored, creating elasticity that allows "a tiny portion of the material to bend or stretch." After the ultrasound is turned off, the material immediately returns to its original shape, but the data stored during the process remains in a dense form."
Great, thanks. It's not as if we didn't have to deal with that already.
Did you know that "FTW" ("for the win") is a direct translation of "Sieg Heil"?
"...as yet untested."
Remind me when you've actually tested it before I get excited.
This new HDD is great... but now my dog is running in circles howling!
"Never give up, for that is just the time and place when the tide will change." -Harriet Beecher Stowe ^_^
"Ultrasound waves" is incorrect usage (source = http://en.wikipedia.org/wiki/Ultrasound_(disambiguation) ). Starting with "ultrasonics" or "ultrasonic waves" would have been more apt.
I love that slashdot is pushing articles on ultrasonics. Ultrasonics seems like the field of the future to me. I remember my first encounter with ultrasonics in gradeschool. I had a friend that broke his arm skateboarding]. His doctor prescribed an ultrasonic bone massager that was intended to increase the rate of bone growth (he had a cast as well, the doctor was not some new-age psuedoscientist). Fast forward into college, when I was interning at a consumer goods manufacturer. They used ultrasonics to bond together nonwovens! Totally sweet. The process used a very specifically shaped piece of metal, called a horn, which flexed in a very specific manner when subjected to ultrasonic frequencies (ultrasonic transducers can perform this electric to mechanical energy conversion). It requires a whole lot less energy than what was done before, which was more like hammering nails - you have to smash super hard, and the whole ordeal is more of an art than a science). Nowawdays they are beginning to use ultrasonic waves to benefit the flow of polymers in injection molding. Oh yah, and like you already mentioned, magnetic storage. This field is just skyrocketing.
No trees were killed to send this message, but a great number of electrons were terribly inconvenienced.
Maybe that part is related to a recent article indicating that heat could be used to restore broken NAND flash cells back to working order:
http://hardware.slashdot.org/story/12/12/02/2222235/self-healing-nand-flash-memory-that-can-survive-over-100-million-cycles
Perhaps ultrasound is a way to deliver that heat.
RETURN without GOSUB in line 1050
Heat generally reduces the cycle life of NAND, so I don't see why you'd want to apply localized heating, even if it allowed higher density. I didn't see any mention of NAND in the OSU link, so where did Computer World pick that up?
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