Wiping a SSD clean before upgrading

Discussion in 'OS X Mountain Lion (10.8)' started by AT0MAC, Sep 13, 2012.

  1. macrumors regular

    AT0MAC

    Joined:
    Jun 4, 2011
    Location:
    Copenhagen, Denmark
    #1
    I want to wipe my SSD clean before I upgrade to Mountain Lion - but how exactly would be the most "healthy" way to do it (so I don't wear out too much of it's lifespan)?

    Im thinking if it's possible to make a rEFIt USB and install HDDErase.exe to perform a secure erase command directly from my Intel 520 SSDs firmware?
     
  2. macrumors 68030

    Krazy Bill

    Joined:
    Dec 21, 2011
    #2
    No need for secure erase. Just format it.
     
  3. thread starter macrumors regular

    AT0MAC

    Joined:
    Jun 4, 2011
    Location:
    Copenhagen, Denmark
    #3
    But will a format not just mark the cells as "dirty" and then install ML a different place in the SSD?

    How long will it typical take before my garbage collection kicks in an truly erases the dirty cells?
     
  4. Julien, Sep 13, 2012
    Last edited: Sep 13, 2012

    macrumors 603

    Joined:
    Jun 30, 2007
    Location:
    Atlanta
    #4
    Data is simply 0's or 1's and not "dirt". On a reformatted HD and fresh OS X install the Trash program knows nothing about the data that "was" on the HD. To the newly installed OS X the HD is open to read/write anywhere it wants and sees the formatted HD as "blank". Unless you are afraid someone is going to steal your HD and spend lots of time/effort/money trying to recover files that would not be overwritten with the new install you are creating a problem that doesn't exist.

    If you see this as a problem then use Disk Utility and format using most secure and it will writ all 0's and you will have no "dirt".
     
  5. macrumors 604

    thejadedmonkey

    Joined:
    May 28, 2005
    Location:
    Pa
    #5
    If you 0 out the drive, it will be "fresh", however it's not really necessary. Just do a quick format and the read speeds will still be so rediculously fast that you won't notice.

    Plus, you'll never have to worry about it slowing down :p
     

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