Disk utility's erase options

Discussion in 'Mac OS X Lion (10.7)' started by diegobgr, Aug 4, 2011.

  1. diegobgr macrumors 6502

    Nov 22, 2009

    I am wondering about the difference between the Disk Utility's secure erase options:

    -Don't Erase Data
    -Zero Out Data

    It is any difference thinking about disk performance?

    I am to make a full clean Lion install from bootable USB. Which one should I choose?
  2. DockMac, Aug 4, 2011
    Last edited: Aug 4, 2011

    DockMac macrumors regular

    Dec 22, 2008
    Zero or Not

    If you are interested in high security, zero out data. it just takes a little longer. (BTW, more passes, the longer it will take.) This will truly "erase" your data.

    If not, just "erasing" it is just fine. IIRC, it will be significantly faster than zero out all data on the drive. Just "erasing" the drive doesn't real erase anything at all. It just removes all the pointers to the file location, so it can be overwritten by files later on.

    I don't think either one will have a performance advantage.
  3. robgendreau macrumors 68040

    Jul 13, 2008
    If you intend to keep this drive and use it with Lion, anything but a plain-old erase is rather a waste of time since unless there's something you haven't told us.

  4. Quad5Ny macrumors 6502a


    Sep 13, 2009
    New York, USA
    Also if you have a SSD anything other than "Don't Erase Data" can put a lot of wear on your drive.

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