OS X Snow Leopard’s Secure Delete Doesn’t Work With SSDs

OS X’s secure delete, which overwrites data multiple times so snoops can’t recover them even if they have access to your hard drive, turns out to not work with SSDs. The problem? SSD write algorithms are different, because the physical media is different, but also to preserve its lifespan. The end result though is 2/3 of a file can be recoverable. [ZDnet]

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(3 Comments)
  • [–]

    Jeffery King

    Tuesday, February 22, 2011 at 11:28 AM

    How ? this is crap, if you understood SSD’s you would know, once something has been deleted its gone, its not an image, its a cell. I have customers all the time asking me to “retrieve their data” (failed SSD) its simply impossible. Because of a way an SSD controller writes to flash.

    Why do you think data recovery places hate the fact the one day everything will be SSD ?

    • [–]

      Arthur

      Tuesday, February 22, 2011 at 1:02 PM

      Because they don’t know how to retrieve from SSDs.

  • [–]

    The Gremlin

    Tuesday, February 22, 2011 at 11:52 AM

    I’ve always been curious about those differences. How SSD work to simulate something they’re not, an HDD.

    Maybe future file systems will end up changing, when we’re all on SSDs to work with the native structure they have. Or we’ll drag the HDD emulation forever…

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