Wipe hard drive clean

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Hard drives
How do I wipe my hard drive clean?
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In truth, a hard drive is really never wiped clean by a format, there will always be some bits of data that, with the proper tools, can be reconstructed.  Look what the three letter organizations do now… 

Some of the books say to truly wipe a drive is to format it no less than seven times.  Personally, the only way to enforce no one accessing your data is to wiped it, format it, and then degauss it.  What is that?  It is when you punch many holes in the disk and crush it up into little pieces.  This is the “by the book” for all classified hard drives to be dealt with once they are no longer used.  Even CD/DVDs are to be put through a shredder, not just cut up with scissors anymore.

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  • TheRealRaven
    It kind of depends on the specs of the "hard drive" and on what equipment you have to do the work. It can also depend some on your experience.

    The first thing that I try is the drive's builtin "secure erase" feature. It's been a feature of almost every PC-style "hard drive" since they grew beyond 50MB or so in capacity. It's available through the Center for Memory and Recording Research:
    It's approved for most government uses until getting up to the 'Secret' and higher category. It's faster than many other utilities, especially ones that use overwrite methods that can be many times slower.

    Read the docs for info about securely erasing in general.

    After that, it gets into the dependencies I mentioned at first. See the How to Wipe (Securely Erase) Your Devices Before Disposing of or Selling Them article for good alternatives for different devices and circumstances.
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  • Subhendu Sen
    What is the cause that you wanted to wipe your HDD. Have you taken all backups and kept them in a secure media. Also what did you mean by "Wipe" that is complete format/ low level format.
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