2010 iMac i7 -- freezing at shutdown

Discussion in 'iMac' started by natallica, Jul 29, 2011.

  1. natallica macrumors 6502

    Joined:
    Mar 7, 2005
    Location:
    Fairfax, VA
    #1
    Hello all -

    I have a 2010 Core i7 iMac that's been working great w/10.6.8 until this week.

    It started not being able to switch users or shut down. It would just hang at the blue screen.

    I ran Disk Verify and got the following:

    2011-07-28 13:00:06 -0400: Starting verification tool:
    2011-07-28 13:00:07 -0400: Performing live verification.
    2011-07-28 13:00:07 -0400: Checking Journaled HFS Plus volume.
    2011-07-28 13:00:07 -0400: Checking extents overflow file.
    2011-07-28 13:00:07 -0400: Checking catalog file.
    2011-07-28 13:01:25 -0400: Missing thread record (id = 753199)
    2011-07-28 13:01:25 -0400: Missing thread record (id = 873047)
    2011-07-28 13:01:25 -0400: Missing thread record (id = 1131505)
    2011-07-28 13:01:25 -0400: Missing thread record (id = 1202332)
    2011-07-28 13:01:25 -0400: Missing thread record (id = 1600970)
    2011-07-28 13:01:25 -0400: Missing thread record (id = 1627785)
    2011-07-28 13:01:25 -0400: Missing thread record (id = 1727708)
    2011-07-28 13:01:26 -0400: Missing thread record (id = 2614240)
    2011-07-28 13:01:26 -0400: Missing thread record (id = 3382582)
    2011-07-28 13:01:26 -0400: Missing thread record (id = 3433200)
    2011-07-28 13:01:26 -0400: Missing thread record (id = 3528266)
    2011-07-28 13:01:26 -0400: Missing thread record (id = 3667350)
    2011-07-28 13:01:26 -0400: Incorrect number of thread records
    2011-07-28 13:01:26 -0400: Checking multi-linked files.
    2011-07-28 13:01:26 -0400: Checking catalog hierarchy.
    2011-07-28 13:01:26 -0400: Invalid volume directory count
    2011-07-28 13:01:26 -0400: (It should be 298169 instead of 298181)
    2011-07-28 13:01:26 -0400: Checking extended attributes file.
    2011-07-28 13:01:26 -0400: Checking volume bitmap.
    2011-07-28 13:01:26 -0400: Checking volume information.
    2011-07-28 13:01:26 -0400: The volume Mac HD - The Intersect was found corrupt and needs to be repaired.
    2011-07-28 13:01:26 -0400: Error: This disk needs to be repaired. Start up your computer with another disk (such as your Mac OS X installation disc), and then use Disk Utility to repair this disk.2011-07-28 13:01:26 -0400:
    2011-07-28 13:01:26 -0400: Disk Utility stopped verifying “Mac HD - The Intersect”: This disk needs to be repaired. Start up your computer with another disk (such as your Mac OS X installation disc), and then use Disk Utility to repair this disk.
    2011-07-28 13:01:26 -0400:

    ***

    I used AppleJack to repair the disk and it took a couple iterations to work. I then ran the other utilities that come with AppleJack just to try fixing anything wrong.

    The computer seemed to work fine for a couple shutdowns until it hung again. I then ran Disk Verify again and got more errors.

    The last time I had a Mac which I had to repair the file system on it turned out to be a bad hard drive so I tried running Drive Genius and TechTool Pro. Drive Genius finds bad sectors, but TechTool Pro says the disk and file structure are fine (even though Disk Utility tells me there are issues).

    I talked to someone at AppleCare earlier and they suggested I try reinstalling Snow Leopard. I attempted to do this and the installation goes from "45 minutes remaining" to the computer attempting to restart. When it restarts, it gets stuck at the Apple logo and never even shows the progress wheel. The only way I can get it to boot again is to to a PRAM reset. I tried installing a 2nd time only to have the exact same thing happen.

    Any thoughts on what to do before I can take it to a Genius Bar over the weekend? I wasn't really looking forward to lugging a 27" iMac to the Apple Store, but what can you do? :)

    -- N
     
  2. Detrius macrumors 68000

    Joined:
    Sep 10, 2008
    Location:
    Asheville, NC
    #2
    If your directory structure keeps getting corrupt, the likely culprit is a bad hard drive. Theoretically, bad RAM could cause it too, but it would also cause other random crash issues.
     
  3. natallica thread starter macrumors 6502

    Joined:
    Mar 7, 2005
    Location:
    Fairfax, VA
    #3
    Agreed, but the genius bar guy didn't agree.

    He was able to install Snow Leopard over my old copy using his disk and I brought the iMac home to install the combo update to 10.6.8 and then ran a disk permissions repair using AppleJack.

    Seems to be okay for now, but I'll keep checking for any more file system corruption and if it comes back will ask them again if the disk can be replaced. They didn't seem interested in doing it today.

    -- N
     
  4. natallica thread starter macrumors 6502

    Joined:
    Mar 7, 2005
    Location:
    Fairfax, VA
    #4
    And after a few hours I'm not able to shut down again...

    -- N
     

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