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recurrent disk corruption issue

378 Views 10 Replies Latest reply: Jan 18, 2013 3:51 PM by Godzila RSS
Godzila Calculating status...
Currently Being Moderated
Jan 16, 2013 1:45 PM

Dear all


I'm seeing a recurring problem with my boot disk becoming somehow corrupted.


As often a picture is worth a thousand words:




This is happening on a MacBook pro with an Apple(provided - it's a Samsung) SSD under 10.8.2 full patch.


The really interesting thing is that  Disk Utility gives the disk a clean bill of health ! My only way to correct the problem is with Disk Warrior. But it reappears after a few weeks. This has started after upgrading to 10.8 (never had anything like this on the very same hardware with 10.7).


There isn't any immediate adverse effect except for Time Machine reporting "unexpected errors"


Not a show stopper but I don't feel confident with this lurking in the background.

MacBook Pro (13-inch Late 2011), OS X Mountain Lion (10.8.2)
  • Linc Davis Level 10 Level 10 (108,120 points)
    Currently Being Moderated
    Jan 16, 2013 6:49 PM (in response to Godzila)

    Boot into Recovery and repair the partition table -- not the boot volume -- in Disk Utility. You do that by selecting the drive icon and then running Repair Disk.

  • Linc Davis Level 10 Level 10 (108,120 points)
    Currently Being Moderated
    Jan 17, 2013 9:04 AM (in response to Godzila)

    Try changing the system language to English temporarily. Any difference? If not, boot in safe mode (shift key down at startup) and check again. Same?

  • Linc Davis Level 10 Level 10 (108,120 points)
    Currently Being Moderated
    Jan 17, 2013 4:08 PM (in response to Godzila)

    I have changed the regional setting (the date / number formats) to US English


    That's what I was thinking of.


    Doing a safe boot results in correct figures being reported


    That looks like a single-user boot. A safe boot is selected by holding down the shift key at the startup chime. If you haven't done that, try it and log in. Same?

  • Linc Davis Level 10 Level 10 (108,120 points)
    Currently Being Moderated
    Jan 18, 2013 7:52 AM (in response to Godzila)

    Please read this whole message before doing anything.
    This procedure is a diagnostic test. It won’t solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
    The purpose of this test is to determine whether the problem is localized to your user account. Enable guest logins* and log in as Guest. For instructions, launch the System Preferences application, select Help from the menu bar, and enter “Set up guest users” (without the quotes) in the search box. Don't use the Safari-only "Guest User" login created by "Find My Mac."
    While logged in as Guest, you won’t have access to any of your personal files or settings. Applications will behave as if you were running them for the first time. Don’t be alarmed by this; it’s normal. If you need any passwords or other personal data in order to complete the test, memorize, print, or write them down before you begin.
    Test while logged in as Guest. Same problem?
    After testing, log out of the guest account and, in your own account, disable it if you wish. Any files you created in the guest account will be deleted automatically when you log out of it.
    *Note: If you’ve activated “Find My Mac” or FileVault in OS X 10.7 or later, then you can’t enable the Guest account. The "Guest User" login created by "Find My Mac" is not the same. Create a new account in which to test, and delete it, including its home folder, after testing.

  • Linc Davis Level 10 Level 10 (108,120 points)
    Currently Being Moderated
    Jan 18, 2013 2:16 PM (in response to Godzila)

    Safe mode has reduced functionality; that's why it's slow.


    It looks to me as though something is wrong with your SSD. I would first try erasing it and restoring from a backup. If that doesn't make a difference, you'll either have to live with it or get rid of it.


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