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time machine slow.

1092 Views 20 Replies Latest reply: Aug 22, 2013 8:11 AM by mmasek RSS
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wcrowder Calculating status...
Currently Being Moderated
Feb 11, 2013 8:17 AM

I have a MBA, its all up to date- anyway: I restored the computer to a week prior state to sync restore my phone to a prior OS. Then I restored the MBA to the latest backup (about 10 minutes before I went backwards), it all went fine.

 

Now when I try to re sync time machine it takes a very long time. after about 20 minutes it had written abou 8K of the 25 gigs it says need to be sent to the time machine.

 

I use a 500 gig external disk.

 

I canceled the update, and will wait a few days, or a response to re-try. I think maybe the time machine, and my machine to reindex the changes since the restore. any ideas/information will be appreciated.

 

Regards,

Liam

MacBook Air (11-INCH, MID 2011), OS X Mountain Lion (10.8.2)
  • dwb Level 6 Level 6 (19,705 points)
    Currently Being Moderated
    Feb 11, 2013 10:23 AM (in response to wcrowder)

    You restored the computer which changed the state of a whole slew of files. TimeMachine saw massive changes between the last backup and the current state of the files on your hard drive. Therefore it wants to back up everything that changed as a result of the restore. No way around it, let TimeMachine have at it.

  • Carolina Parrothead Calculating status...
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    Feb 11, 2013 10:31 AM (in response to dwb)

    I am having the same problem:

     

    Current Time Machine Backup after Mac Mini Server Update

    Backing up 1,567,780 Items

    683.6 MB of 894.43 GB - About 136 Days

     

    It is a problem!

  • dwb Level 6 Level 6 (19,705 points)
    Currently Being Moderated
    Feb 11, 2013 11:45 AM (in response to wcrowder)

    I think you are mistaken. The state of the computer changed between the last backup and the new one - even though the effect of the changed state is to restore it to the same state. TimeMachine doesn't do a bit by bit comparison, it looks at file changes and while the creation data of the files didn't change, the modify date did when you did the restoration and that is enough to make TM think a change occurred.

  • dwb Level 6 Level 6 (19,705 points)
    Currently Being Moderated
    Feb 11, 2013 12:26 PM (in response to wcrowder)

    Look back thru your description of the problem - did you ever mention the time element until you dissed me? Right, you didn't. I dealt with what you told me - that you didn't understand why your TM backup was so large.

     

    But you betcha - I'll stop posting any more replies to this thread. Just keep in mind that we're all volunteers here at ASC and we can easily volunteer to ignore boorish trolls. And do.

  • Csound1 Level 7 Level 7 (32,380 points)
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    Feb 11, 2013 3:48 PM (in response to wcrowder)

    wcrowder wrote:

     

    So on a 25 GB backup...taking 20 minutes to move 8KB it will take...9.375x10^6 hours. I think thats more than my applecare period. Since thats 400,000 days, im confident that this is not normal.

    You are making invalid or unsupported assumptions, The rate of data transfer is not a constant.

  • Csound1 Level 7 Level 7 (32,380 points)
    Currently Being Moderated
    Feb 11, 2013 3:49 PM (in response to Carolina Parrothead)

    Carolina Parrothead wrote:

     

    I am having the same problem:

     

    Current Time Machine Backup after Mac Mini Server Update

    Backing up 1,567,780 Items

    683.6 MB of 894.43 GB - About 136 Days

     

    It is a problem!

    No, it is an estimate, you currently do not know how long it will take.

  • Pondini Level 8 Level 8 (38,710 points)
    Currently Being Moderated
    Feb 11, 2013 3:51 PM (in response to wcrowder)

    wcrowder wrote:

     

    I have a MBA, its all up to date- anyway: I restored the computer to a week prior state to sync restore my phone to a prior OS. Then I restored the MBA to the latest backup (about 10 minutes before I went backwards), it all went fine.

    Are you saying you did two separate restores?

     

    Were both "full system restores," starting from your Recovery HD?  If not, please clarify.

     

    The fact that TM is trying to back up 25 GBs sounds like something may have gone wrong, or you didn't do full system restores.  How much data is on your Mac's internal HD?

     

    Under the best of circumstances, the first backup after a full restore will take quite a while.  Is this the first backup attempt since the restores?  Or have any competed, failed, or been cancelled?

     

    A clue may be lurking in your logs.  Use the widget in #A1 of Time Machine - Troubleshooting to display the backup messages from your logs.  Locate the backup in question, then copy and post all the messages here.

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