chicomn
Level 1 (0 points)

Q: Startup brings me to disk utility

OOnce in disk utility, diskOs2 will not repair, invalid node structure and invalid B-tree node, anything I can do to fix this? was not shut down properly and left out in -14f temps last night! My luck I'm hosed but please help if you can

thanks

Posted on Jan 7, 2015 1:32 PM

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chicomn

Q: Startup brings me to disk utility

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  • Helpful answers

  • by Kappy,

    Kappy Kappy Jan 7, 2015 1:42 PM in response to chicomn
    Level 10 (271,794 points)
    Desktops
    Jan 7, 2015 1:42 PM in response to chicomn

    Install or Reinstall OS X from Scratch

     

    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.

     

    Boot to the Recovery HD:

     

    Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.

     

    Erase the hard drive:

     

      1. Select Disk Utility from the main menu and click on the Continue button.

     

      2. After DU loads select your startup volume (usually Macintosh HD) from the

          left side list. Click on the Erase tab in the DU main window.

     

      3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on

          the Security button and set the Zero Data option to one-pass. Click on

          the Erase button and wait until the process has completed.

     

      4. Quit DU and return to the main menu.

     

    Reinstall OS X: Select Reinstall OS X and click on the Install button.

     

    Note: You will need an active Internet connection. I suggest using Ethernet if possible

               because it is three times faster than wireless.

     

    If the above doesn't work then the drive needs to be replaced.

  • by chicomn,

    chicomn chicomn Jan 7, 2015 2:34 PM in response to Kappy
    Level 1 (0 points)
    Jan 7, 2015 2:34 PM in response to Kappy

    WWay to backup anything at this point  if I can't mount to that disk?

  • by Kappy,

    Kappy Kappy Jan 7, 2015 2:40 PM in response to chicomn
    Level 10 (271,794 points)
    Desktops
    Jan 7, 2015 2:40 PM in response to chicomn

    I don't rightly know. The drive may be damaged. You can remove it from the computer and see if you can access it in another computer by putting it in an external enclosure. You can try connecting two Macs fir Firewire or Thunderbolt cable and booting the computer into Target Disk Mode so you might access it from the other computer.