1 Reply Latest reply: Nov 28, 2012 12:23 PM by Linc Davis
shannonadams Level 1 Level 1 (0 points)

I have a user who has not been able get a complete Time Machine backup since he upgraded to Mountain Lion.  He is backing up to an external USB hard drive.  We even replaced the external drive with a new one and reformatted it (Mac OS Extended Journaled).  What happens is that when starting the first backup, it shows as "preparing for backup" under the TM status windows and "cleaning" on a popup status.  After about 20-30 minuutes, the backup starts.  The system slows down to a crawl.  There is about 271 GB to backup.  It will run for a few hours then fail.  The error is attached.  I've been on the phone with Apple Care and they suggested what we already did - try a different drive, format as Mac OS Journaled, etc.  Is there a log file that I can look at to see why it is failing?  Any other suggestions?





OS X Mountain Lion (10.8.2)
  • Linc Davis Level 10 Level 10 (173,925 points)

    If you have more than one user account, these instructions must be carried out as an administrator.

    Launch the Console application in any of the following ways:

    ☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

    ☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

    ☞ Open LaunchPad. Click Utilities, then Console in the icon grid.

    Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left.

    Enter the word "Starting" (without the quotes) in the String Matching text field. You should now see log messages with the words "Starting * backup," where * represents any of the words "automatic," "manual," or "standard." Note the timestamp of the last such message. Clear the text field and scroll back in the log to that time. Post the messages timestamped from then until the end of the backup, or the end of the log if that's not clear.

    Post the log text, please, not a screenshot. If there are runs of repeated messages, post only one example of each. Don't post many repetitions of the same message.

    When posting a log extract, be selective. Don't post more than is requested.

    Please do not indiscriminately dump thousands of lines from the log into a message.


    Some personal information, such as the names of your files, may be included — edit that out, too, but don’t remove the context.