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Time Machine Back up

311 Views 11 Replies Latest reply: Feb 17, 2013 10:36 AM by McPAED RSS
James Borzak Calculating status...
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Feb 16, 2013 3:51 AM

According to Disc utility my four internal hard drives have used a total of 1050 GB or 1.05 TB. My back up is an external 2TB drive. Time has warned that my 2TB is almost full which I can see it is in finder. My question is: If I have used 1.05 TB of stored data why is my back up over 2TB. I should have plenty of space available. Time machine has used 1.9TB.

Mac Pro (Early 2008), OS X Mountain Lion (10.8.2), Acer 24 inch, 300, 500,2x 1000 GB drives, 2TB backup
  • mende1 Level 10 Level 10 (89,470 points)
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    Feb 16, 2013 3:55 AM (in response to James Borzak)

    That's because you probably haven't got enough space to make the next backup. Note that you have to back up a lot of GBs.

     

    Normally, Time Machine should delete automatically old backups to make space for the next backup. If not, see > http://pondini.org/TM/12.html

  • mende1 Level 10 Level 10 (89,470 points)
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    Feb 16, 2013 4:11 AM (in response to James Borzak)

    You can erase the external disk and start your backups again, but I don't think that you would want to lose all your backups.

     

    Theoretically, Time Machine will start deleting backups soon. See > http://pondini.org/TM/C4.html

  • Linc Davis Level 10 Level 10 (107,445 points)
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    Feb 16, 2013 11:17 AM (in response to James Borzak)

    Open the Time Machine preference pane, unlock it if it's locked, click Options, and uncheck the box marked Notify after old backups are deleted.

  • McPAED Calculating status...
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    Feb 17, 2013 6:18 AM (in response to James Borzak)

    Hello,

     

    Need some additional information to attempt to help you.

    Can you please :

     

    1. Copy the exact Time Machine warning message in the post
    2. Open a terminal window
    3. Type following command :
      tmutil listbackups
    4. Copy and paste the results in the post
    5. Type following command :
      df -g
    6. Copy and paste the results in the post

     

    Regards.

  • Linc Davis Level 10 Level 10 (107,445 points)
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    Feb 17, 2013 8:58 AM (in response to James Borzak)

    Your problem seems to arise from a misunderstanding of how Time Machine works. The backup includes files that you've deleted from the source volume(s), as well as old versions of files that you've changed. It's normal for TM to nearly fill a backup volume. You haven't shown any evidence that it isn't working as designed.

  • Linc Davis Level 10 Level 10 (107,445 points)
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    Feb 17, 2013 10:07 AM (in response to James Borzak)

    Are you saying that you got a warning that TM couldn't back up? I don't see where you've actually said that before. As of earlier today -- after the date of your original post in this thread -- it was backing up successfully. If that's still the case, you don't need to do anything. TM manages disk space automatically and deletes old snapshots as necessary to make room for new ones.

  • McPAED Level 1 Level 1 (70 points)
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    Feb 17, 2013 10:36 AM (in response to James Borzak)

    Hello again,

     

     

    From the informations you sent, I can see following things :

     

    1. Your backup disk contains TM backups since July 20th 2010, meaning more than two years of backup ... which is expected regarding involved capacities.
    2. Your backup disk have 89 GB free space.
    3. TM backup cleanup mechanism seems to be operational : weekly backups as far as possible, daily backups for the past month, and hourly backups for the last day.

     

    So, up to now, your TM backups seems to work as designed : main idea of TM is that it should automatically cleans up older backups for you to make space for new ones.

     

    To go to further checkup, can you please do the following :

     

    1. From Applications>Utilities, open "Console" application.
    2. In the "Filter" box on the top right corner, type :
      backupd
    3. Copy and paste the last 30 messages in the post
    4. A copy of TM warning message would be very useful ...

     

    Regards.

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