1 Reply Latest reply: May 3, 2013 8:04 PM by Linc Davis
Matt Crawford2 Level 1 Level 1 (95 points)

Time Machine is stuck in a new way. "dtruss -e -p <pid>" shows it in a loop doing nothing but this:


   1032 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1143 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1155 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1146 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1153 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1152 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1138 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1146 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60
   1155 __semwait_signal(0xC03, 0x0, 0x1) = -1 Err#60


(The numbers are the elapsed times in microseconds. Err#60 is ETIMEDOUT.)


Repeated use of lsof shows that backupd has no regular files open except its log file, which ends with


Processing preflight info

    Space needed for this backup: 3.83 GB (933889 blocks of size 4096)

    Preserving last snapshot /Volumes/Loki TM/Backups.backupdb/loki/2013-04-18-073658

Finished processing preflight info


Copying items from "Loki HD" (mount: '/' fsUUID: 9E4DC7A0-9DDE-3A37-827F-3BB94B19F396 eventDBUUID: AD43DC6A-C748-44F2-8A1B-494E472E3214)



I killed it, trashed the .inProgress backup, and started it up again and it has been like this for two more days.


The backupd disk is a partition on a local firewire drive. Backups had been proceeding normally for a couple of months at least.


Any ideas?

iMac, OS X Mountain Lion (10.8.2), 24", mid-2007, 4GB
  • 1. Re: Time Machine stuck in a new and different way
    Linc Davis Level 10 Level 10 (118,085 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. If you don't see that menu, select

    View Show Log List

    from the menu bar.


    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. Select the messages timestamped from then until the end of the backup, or the end of the log if that's not clear. Copy them (command-C) to the Clipboard. Paste (command-V) into a reply to this message.

    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 this discussion.


    Some personal information, such as the names of your files, may be included — anonymize before posting.