C0RR0SIVE
Golden Master
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- 9,213
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- Lexington, KY
The reason it can be recovered no matter how many times it was wrote over is because of magnetics. Some of the old magnetic flip of those bits are left forever, and the disk heads can pick up these small fields, and some machines if you extract the platters and place them into can detect the magnetic field of each bit that even the heads cant, though I don't see most people or the government going so far as to pull platters unless it dealt with DHS.
I remember running recovery software on a disk of mine a few times, after around 40 some odd formats on it, it could go back through each and every single format and successfully recover MOST the data provided it wasn't a large file.
In all honesty, I wouldn't worry about erase methods unless you plan on giving people easy access to the disk. If you are worried about loss of the flash drive your using and someone for some reason running recovery software on it, buy one that uses biometric security, or after 3 failed logon attempts the flash drive destroys the chip for good physically. They aren't cheap, but it keeps prying eyes away from the files.
I remember running recovery software on a disk of mine a few times, after around 40 some odd formats on it, it could go back through each and every single format and successfully recover MOST the data provided it wasn't a large file.
In all honesty, I wouldn't worry about erase methods unless you plan on giving people easy access to the disk. If you are worried about loss of the flash drive your using and someone for some reason running recovery software on it, buy one that uses biometric security, or after 3 failed logon attempts the flash drive destroys the chip for good physically. They aren't cheap, but it keeps prying eyes away from the files.
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