Time Machine secret technique?

Discussion in 'OS X Mountain Lion (10.8)' started by sytrusze, Sep 13, 2012.

  1. macrumors member

    Joined:
    Nov 17, 2010
    #1
    Dear members,

    I was just wondering how Time Machine works. I have an 1TB Time Machine harddrive. The Time Machine harddrive contains the following maps:

    Backups.backupdb -> Sytrus iMac -> (In here i have about 30 backup maps from january to yesterday's date)

    All those 30 maps are 650gb large. Let's do math: 30 x 650gb = 19.500gb = +- 19TB, that's 19 times the size of my harddrive.

    How is this possible?
     
  2. macrumors member

    Joined:
    Feb 11, 2012
    #2
    If I had to guess I'd say it's using a form of hard linking. You might have two files in different locations pointing to the same data.
     
  3. macrumors P6

    Weaselboy

    Joined:
    Jan 23, 2005
    #3
    That is exactly what it is. More info here.
     
  4. thread starter macrumors member

    Joined:
    Nov 17, 2010
    #4
    Interesting article, thanks for the link and explanation.
     

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