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allen2

Recommended Wiping tool/method for hdd

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You can see some images where the magnetic polarisation is read at a small scale, for instance here
http://aip.scitation.org/doi/full/10.1063/1.4944951
especially the Fig. 5
http://aip.scitation.org/na101/home/literatum/publisher/aip/journals/content/adv/2016/adv.2016.6.issue-3/1.4944951/production/images/large/1.4944951.figures.f5.jpeg
at a perfect scale for hard disk drives.

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1 hour ago, pointertovoid said:

... reading 100 atoms at one proper radius suffice to get the information free of noise

....

The spin-sensitive STEM is just the answer to smaller bits and perpendicular recording. All the rest is identical to information recovery on a damaged HDD or a damaged partition and is banal.

Ah well, then it is better to encrypt data, make no less than 3 random passes and finally destroy hard disks with a sledge hammer, right after having passed them through a degausser and an oven at a temperature above Curie point, in order to have a reasonable amount of security.

Please, as soon as someone recovers any meaningful data after a single 00 pass through a STEM (or whatever) don't forget to update this topic with a link to the report or published paper, thank you.

jaclaz


 

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2 hours ago, pointertovoid said:

The argument with the second law doesn't apply and was pseudo-science.

No pseudo-science at all.

2 hours ago, pointertovoid said:

The second law has nothing to do with puzzles, and everything to do with entropy, internal energy, temperature, enthalpy and the likes.

Of course it does. Entropy reflects the number of degrees of liberty presented by a system. A solved puzzle has just one, etc. Your understanding of the concept of entropy seems to be too narrow. You should study more. No offense meant.

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