Time Machine not, um, adding up...

Discussion in 'Mac Basics and Help' started by OrangeCuse44, Jun 18, 2009.

  1. OrangeCuse44 macrumors 65816

    OrangeCuse44

    Joined:
    Oct 25, 2006
    Location:
    Long Island, NY
    #1
    So out of nowhere Time Machine isn't backing up correctly. I attached screen shots of exactly what is happening. On my internal HD, I have 322GB used, 64 GB excluded from backup, and an external HD capacity of 297 GB. For all those non mathematicians out there, I am trying to back up 258 GB on a 297 GB drive. I'm not exactly sure what TM is trying to do here or how to fix the situation. Any help is appreciated..
     

    Attached Files:

  2. GizmoDVD macrumors 65816

    Joined:
    Oct 11, 2008
    Location:
    SoCal
    #2
    Where can I get your background? Pretty colors...
     
  3. OrangeCuse44 thread starter macrumors 65816

    OrangeCuse44

    Joined:
    Oct 25, 2006
    Location:
    Long Island, NY
    #3
    From here: http://www.hdwallpapers.net/

    So, even with my detailed breakdown of the problem, no ideas?
     
  4. AmbitiousLemon Moderator emeritus

    AmbitiousLemon

    Joined:
    Nov 28, 2001
    Location:
    down in Fraggle Rock
    #4
    I think the trouble you are having involves the way time machine backs up. It doesn't just periodically copy all your files. It creates a timeline of changes to your drive and saves just the changes. This allows you to then use time machine to choose various backup states for both the full drive and for individual files. You could for instance retrieve a paper you have been working on and retrieve backed up copies of it showing the changes made over several days. You basically only have space on that drive for one complete backup. So when time machine tries to go back and save additional changes there isn't enough room. You need a bigger hard drive.
     
  5. gnasher729 macrumors P6

    gnasher729

    Joined:
    Nov 25, 2005
    #5
    Time Machine won't delete the last backup until the next backup is complete - just in case something goes wrong with the next backup. It seems that you have 123 GB of changed files, which Time Machine wants to backup first before it deletes the previous version.

    What you can do: You probably have some idea where these 123 GB are. Exclude that folder from the backup (that might for example be your iTunes music folder, or your folder for videos, or whatever it is you have been changing). Perform the backup, include that folder again, and do another backup.

    Basically with that 40 GB only free on your external drive, Time Machine will have problems whenever you change more than 40 GB between backups.
     
  6. OrangeCuse44 thread starter macrumors 65816

    OrangeCuse44

    Joined:
    Oct 25, 2006
    Location:
    Long Island, NY
    #6
    This makes sense, thank you. Problem is, I have no clue why it thinks I changed 123 GB worth of data. Since my last backup, all I have done is download a bunch of media, which is in the D/L folder I excluded. Quite perplexing. I'm thinking my best bet may be to wipe all previous backups and start fresh?
     

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