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Jim__

(14,045 posts)
Tue Mar 22, 2016, 04:51 PM Mar 2016

Storage density beyond 10 Tb/in2 (terabits / sq in) possible for heat-assisted magnetic recording

From phys.org

[center][/center]
[center]Illustration of two versions of the HAMR writing procedure, showing a laser being used to heat bit B, which enables the bit to be written by a much smaller magnetic field than would otherwise be required. All of the surrounding A bits remain in their original states because they have not been heated (enough), and so cannot be written by the magnetic field. Credit: Vogler, et al. ©2016 AIP Publishing[/center]
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(Phys.org)—Global demand for data storage is constantly increasing, driven by new technologies such as Big Data and the Internet of Things, as well as personal and enterprise storage. The hard disk drives that currently store the majority of the world's data have storage densities of just under 1 Terabit per square inch (Tb/in2). One of the promising technologies being researched for increasing the storage density is heat-assisted magnetic recording (HAMR), which uses lasers to heat individual magnetic grains that are just a few nanometers long. The method requires controlling heat and magnetism on a tiny scale, which has made developing HAMR very challenging.

In a new paper published in Applied Physics Letters, a team of physicists from TU Wien in Vienna, Austria, has developed simulations that realistically model the HAMR write process. Using the simulations, the researchers could independently control a variety of parameters that affect the storage density, and identify the circumstances under which HAMR can achieve its optimal storage density, which they found could be more than 13 Tb/in2.

"The resulting storage density of 13.23 Tb/in² would definitely be the highest density of any commercially available memory to date," coauthor Christoph Vogler at TU Wien told Phys.org. "With such a density, a conventional hard disk drive could have more than 10 times the capacity of today's devices, at the same size. The high density, along with the long-term stability of the stored data, would have a significant impact on desktop and enterprise drives."

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Storage density beyond 10 Tb/in2 (terabits / sq in) possible for heat-assisted magnetic recording (Original Post) Jim__ Mar 2016 OP
Sounds like a potential revival of magneto-optical (MO) storage ... eppur_se_muova Mar 2016 #1
I'm still waiting for the "bubble memory" revolution I was promised. n/t PoliticAverse Mar 2016 #2

eppur_se_muova

(36,227 posts)
1. Sounds like a potential revival of magneto-optical (MO) storage ...
Tue Mar 22, 2016, 04:56 PM
Mar 2016

I always preferred MO's to pure magnetic media, since they are unaffected by external magnetic fields, but they never came down in price.

Also, MO's were read/write from the beginning -- no special formatting or "burning" software needed. Just format to your OS and drag and drop files.

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