cannot delete/unmount old boot volume

Discussion in 'macOS' started by cjoy, Jan 20, 2011.

  1. cjoy, Jan 20, 2011
    Last edited: Jan 20, 2011

    cjoy macrumors member

    Joined:
    Oct 24, 2008
    #1
    I've carbon copied my vanilla install of Mac OS X (SL) onto a SSD and can boot using the latter without problems (also when removing the old drive).
    Now I'd like to delete/partition the former startup volume, but DiskUtility wont let me. It fails to unmount the drive.

    Any ideas on how to solve this issue are much appreciated.

    edit:
    system disk to the rescue - issue resolved
     
  2. mjsmke macrumors 6502a

    Joined:
    Mar 2, 2010
    Location:
    UK
    #2
    Are you sure you have booted from the new drive?

    You could try booting from the install disk then use disk utility from there to erase the old volume.
     

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