extra megabytes

Discussion in 'Mac Basics and Help' started by timelessbeing, Nov 26, 2011.

  1. timelessbeing macrumors member

    Joined:
    Oct 15, 2009
    #1
    I used Superduper to clone one external HD to another. After completion, I clicked "Get Info" for the two volumes. The source says Used: 989.77 GB on disk (989,768,949,760 bytes) and the destination says Used: 989.98 GB on disk (989,975,355,392 bytes). The target HD was erased before the procedure. I compared the Get Info windows for each subfolder on each HD and they exactly matched.

    What is the extra 206,422,016 bytes I am seeing? Some kind of file system overhead?
     
  2. simsaladimbamba

    Joined:
    Nov 28, 2010
    Location:
    located
    #2
    That is the partition map and some extra and important information.
    Here is how it looks in Disk Utility with my 1.5TB HDD in 10.6.8.

    [​IMG]
     
  3. timelessbeing thread starter macrumors member

    Joined:
    Oct 15, 2009
    #3
    Both HDs only have one partition. However, one has a GPT and the other has a APM. GPTs are larger? Or is it because the HD is twice as large as the other?
     

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