Can't Unmount Drive - Help!

Discussion in 'Mac OS X Lion (10.7)' started by legaleye3000, Mar 25, 2012.

  1. legaleye3000 macrumors 65816

    Joined:
    Jul 31, 2007
    #1
    I have two partitions. I'm trying to erase 1 partition in disk utility. When I click the "-" button to remove the partition, it starts but then returns an error message saying it can't unmount the drive. Please help. Thank you.
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    What is on that partition?
    Can you make a screenshot and attach it to your next post?
     
  3. heisenberg123 macrumors 603

    heisenberg123

    Joined:
    Oct 31, 2010
    Location:
    Hamilton, Ontario
    #3
    Is anything from that partition in use maybe in the background?
     

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