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General Chat Thread, Hard drive destruction 'crucial' in General; Originally Posted by Friez Journo's rarely double check stuff I can assure you of that! What I want to know ...
  1. #16

    localzuk's Avatar
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    Quote Originally Posted by Friez View Post
    Journo's rarely double check stuff I can assure you of that!

    What I want to know is how they manage to recover data after a disk has been wiped a good few times, had loads of zeros written to it, and wiped again. I'm sure that all the sectors of the disk would be re-written to the zeros...
    Quote Originally Posted by Wikipedia
    Peter Gutmann investigated data recovery from nominally overwritten media in the mid-1990s. He suggested magnetic force microscopy may be able to recover such data, and developed specific patterns, for specific drive technologies, designed to counter such.[2] These patterns have come to be known as the Gutmann method.
    [ame=http://en.wikipedia.org/wiki/Data_remanence]Data remanence - Wikipedia, the free encyclopedia[/ame]

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    ICT_GUY's Avatar
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    The second you write over data on a hd once the data is no longer available to software recovery. The only way it can then be retrieved is with very sophisticated hardware which will scan the edges of the tracks and try to pick up data left there. (not your average ebay crook)

    This stuff costs a lot of money, and I would put money on the fact that the quality of what is found will not be the greatest. 2 or 3 passes and the level of difficulty increases exponentially.

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    Quote Originally Posted by RabbieBurns View Post
    That link gives me a page with all the appropriate logos and ads but no content is there a hard link page address avalible anywhere on the article?

  5. #20
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    Overwriting Hard Drive Data « SANS Computer Forensics, Investigation, and Response

    Once you have done a 1-Pass wipe the chance of getting any meaningful data back by software is nil, with Magnetic force microscopy the likelihood is so infetesimal it is not worth worrying about. In fact the odds of guessing if a bit is 0 or 1 is 50:50 so you would probably have more luck guessing the bits required in which case you can recover the data without seeing the drive!

    Remember a 1KB file is 1024 bits in the table below

    Last edited by somabc; 23rd March 2009 at 01:05 AM.

  6. #21

    RabbieBurns's Avatar
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    Quote Originally Posted by SYNACK View Post
    That link gives me a page with all the appropriate logos and ads but no content is there a hard link page address avalible anywhere on the article?
    Was intermittent last night, but seems OK now?

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    did anyone actually read the article? It says:

    While Which? recommends smashing hard drives with a hammer, experts say for most consumers that's a step too far.
    Criminals source old computers from internet auction sites or in rubbish tips, to find users' valuable details, and a number of recent cases have shown the dangers in disposing of second-hand equipment.
    A number of software solutions exist to more definitively erase files and information.
    - ie the BBC article clearly recognises that you don't need to physically destroy the disc, you can just use software to clear the drive completely. they do go on to show that smashing the disc does make the data unrecoverable (it does!) but they don't claim that you need to do that.

  8. #23
    Butuz's Avatar
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    All our hard drives are chopped into 3mm square cubes along with the rest of the PC!

    Butuz

  9. #24
    tonyd's Avatar
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    Another method for quickly, and safely destroying the disk is to simply drill through the platters, a couple of holes and job done. But much simpler to use disk erasing software, though maybe not as quick.

  10. #25
    Maz
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    Pfft, you lot are looking too far into it.

    They make great coasters!

  11. #26

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    Could be handy to put them into the foundations of the schools new extension

  12. #27

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    Quote Originally Posted by RabbieBurns View Post
    Was intermittent last night, but seems OK now?
    Yeap, worked but painfully slowly.

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    We have a hard drive crusher:

    SecureIT :: Camara Technology » SecureIT Service

    It's a lot of fun Oddly I Still run DBAN first, can't get out of the habit!

  14. #29
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    Verity Systems Degaussers / Erasers

    I want one of these so bad, its where your data goes to die.
    Last edited by ICT_GUY; 24th March 2009 at 02:28 PM.

  15. #30

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    Quote Originally Posted by Halfmad View Post
    Oddly I Still run DBAN first, can't get out of the habit!
    Heh yeah know what you mean. Had to dispose of some HDs today, wiped them then invited my boss to join me outside with a couple of sledgehammers to exercise the days frustrations. A jolly good time was had by all.

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