Disk utility's erase options

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

  1. macrumors 6502

    Joined:
    Nov 22, 2009
    #1
    Hi!

    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

    macrumors regular

    Joined:
    Dec 22, 2008
    #2
    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. macrumors 68020

    Joined:
    Jul 13, 2008
    #3
    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.

    Rob
     
  4. macrumors 6502a

    Joined:
    Sep 13, 2009
    #4
    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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