how much needs to change for Time Machine to back it up?

Discussion in 'macOS' started by mrklaw, Feb 20, 2008.

  1. mrklaw macrumors 65816

    Joined:
    Jan 29, 2008
    #1
    Just started using Time Machine (have it doing my first backup now)

    Thinking about which folders to exclude. I currently have only my parallels folder and DV capture folder excluded (have that backed up elsewhere). So it is backing up my videos and music. I figured my music is pretty static so its worth the initial hit to backup as I'd want one backup of it anyway.

    but how much needs to change in a file to trigger Time Machine to back it up? If I play a music track, or video, will Time Machine back it up? (thinking the playcount goes up, changing the file). What about if I sync to ipod or apple TV? does that change the original?


    basically I want to avoid Time Machine really bloating my HDD and wasting time backing stuff up that isn't really needed. I want my music/videos backed up but can cope with losing playcounts/ratings etc.


    Should I just manually (or using Backup) back my music videos up?
     
  2. robbieduncan Moderator emeritus

    robbieduncan

    Joined:
    Jul 24, 2002
    Location:
    London
    #2
    Only 1 bit in the file needs to change. Perhaps even 0, if a program writes the same data to the file as is already there it will be "changed".

    I don't think playcounts get stored in the files themselves: they get stored in the iTunes library database file.
     
  3. Eraserhead macrumors G4

    Eraserhead

    Joined:
    Nov 3, 2005
    Location:
    UK
    #3
    Playcounts and ratings are stored in the library.

    Don't backup Paralells with Time Machine as otherwise the whole image will be backed up each time.
     

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