Originally posted by: Sheninat0r
Hmm... I think I read something about how the NSA or FBI or something destroyed data, a few years ago; first, they would write over all the data a couple of times, I think 3 is the DoD standard and 7 is the NSA standard. After that, they would shred/slice the platters into little 1/4" by 1/4" squares and mix them up, and then after that they would melt it all together - and at the end of the article, they even mentioned that all that wasn't a 100% surefire way to delete data. How that works out, I don't know...
Its simple... its called making up work. The only one who can recover data from that is god, but he is a fictional character, so no, there is no way to restore them from that.
But that doesn't stop government organizations from posting guards to watch over the melted metal balls in case someone tries to reconstruct the data that once resided on them, laughable. (there is a poster here whose in the navy and actually had to guard metal slug from HDDs... god disciplined when he commented that only god could recover any data from that)
Shredding and melting is absolutely unnecessary, if you want to be protected against imaginary alien technology (since regular degauss prevents all manner of conceiveable recovery with today's technology). you should just using varying magnetic fields to scramble the data in an unpredictable manner.
Shredding and melthing is completely pointless, shredding is less effective then magnetic fields, and melting is just a waste of resources, but is perfectly effective at eliminating data... taking that well erased hard drive, formatting it, and putting it back on the market actually makes MORE sense. Because constant use by the recipient will serve to much more effectively reerase data against magical alien god creatures with super nanotech that is based on models of physics that we haven't even dreamed up yet. Assuming it could ever be tracked down...
There is software that just writes random 0 and 1 on all your data many times... 3-7 times typically, takes around 40 hours, but is the best solution for a home user that cant get a 1000+$ electromagnet to do it in a second (literally).
End result is identical, the data is gone.
Actually you know what... i wonder if aliens or the paranormal IS the reason that they erase, shred, melt AND guard the leftovers... The only question is, were they serious (like project MK-Ultra), or were they half joking and hoping to get more taxpayer money (like the gay bomb)
http://en.wikipedia.org/wiki/Mk_ultra
http://en.wikipedia.org/wiki/Gay_bomb
These are the same people who came up with those ridiculous methods of data security "methods"... except their data security methods are SLIGHTLY more scientific and sane...