I have an error of invalid node structure

I have an error of invalid node structure.  Can I save my data from my hard drive? Is it even fixable?

Invalid Node Structure is not a hardware failure, it never was (you may still have a hardware failure, but the Invalid Node error is not indicative of this problem. 
Still, Disk utility will certainly fail to fix it, and DiskWarrior will probably fail too.  
But don't despair.  Try this, and don't give up till you've tried it at least three times.
First, get the name of the partition of the failing volume.   You can get it most easily by finding your disk in Disk Utility, selecting your partition (not the drive) and type cmd-i.    Look for "Disk Identifier" right at the top.
Then,  open up Terminal, and type this:
sudo /sbin/fsck_hfs -yprd /dev/disk5s2 
substituting your disk identifier for the one already here.   Keep the "/dev/" part.   Enter your password, and wait.  It may take a while.  I have had this fail several times before finally working so its important to keep trying.   It's faster than a reformat!!!
If the afflicted disk is your startup disk, you will need to do this in recovery mode: restart the computer, hold down option, and wait for the disk options to appear.   Select that, then proceed to Disk Utility and then Terminal as described above.  
Good luck, and always keep a backup!
chris watts

Similar Messages

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    Hi,
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    I just tried to install 10.4.6 on my imac 17inch falt panel. ( os from mac store , black disk )
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    Thankyou for the reply.
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  • Problem when booting - Invalid Node Structure

    Hey!
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  • IMac (March 2009) - Invalid Node Structure problem

    Hi All
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  • Recurring "Invalid Node Structure error"

    Hello all,
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    Took 3+ hours. Came up clean. I have not restored from TM yet. Did the SL updates ect.
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  • Invalid Node Structure error

    Hi All,
    I need some information on how I might solve a problem. I ran my Disk Utility earlier today to verify the HD on my MacBook Pro because my computer just seemed a bit off. It froze the other night when I shut it down.
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    Michelle,
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    Steve M.

  • Invalid node structure error when verifying hard disk, please help

    My 27" Mid 2011 iMac is having hard disk issues. I attempted to repair the disk but received an error that said the disk cannot be repaired and needs to be re-formatted. I have all my files backed up to an external hard drive so I erased and formatted the disk. After reformatting, I ran the verify disk function and got the message saying the HD appears to working properly. I reload OSX Lion and within a day, my computer freezes up and acts as if something is wrong. When I run the verify disk, I get the Invalid Node Structure error multiple times and then the message saying the disk cannot be repaired and I need to reformat the drive. I have completed this process several times and have had no luck. I have looked at a few forums with people who have had somewhat similar problems but am still unsure. I have seen people recommend programs like Disk Warrior to repair issues the hard disk utility cannot but I don't want to spend $100 dollars on this program if my hard disk is damaged and needs to be replaced. Any suggestions? Thank you

    Make a "Genius" appointment at an Apple Store, or go to another authorized service provider.
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  • Macbook Leopard 10.5 is not booting up and not even getting Verified Error : Invalid Node Structure

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    Helloi
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  • Invalid Node Structure errors keep coming back,

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    Hello.
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    Create a data recovery/undelete external boot drive
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