Disk utility can't unmout External Drive

Discussion in 'MacBook' started by abiteoftheapple, Mar 26, 2011.

  1. abiteoftheapple macrumors newbie

    Joined:
    Mar 26, 2011
    #1
    Hi all :)

    My macBook can't unmount my External Hard drive in Disk utility when I try to erase all the data on it. I get a message :

    Disk erase failed

    Disk Erase failed with the error:

    Could not unmount disk


    And when I try to erase folders on the disk I get a message :

    The operation can’t be completed because one or more required items can’t be found.
    (Error code -43)

    Any ideas ?
    Please help,
     
  2. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #2
    Boot from the install disc and use its Disk Utility. I've had this same issue but that method has never failed.
     
  3. abiteoftheapple thread starter macrumors newbie

    Joined:
    Mar 26, 2011
    #3
    The Mac OSX install disk ?

    Sorry kinda new,
    Thanks
     
  4. Hellhammer Moderator

    Hellhammer

    Staff Member

    Joined:
    Dec 10, 2008
    Location:
    Finland
    #4
    Yes. The grey discs that came with your Mac.
     
  5. abiteoftheapple thread starter macrumors newbie

    Joined:
    Mar 26, 2011
    #5
    Okay, need to find them first :)

    Thank you very much.
     

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