Fix Disk Utility error: invalid node structure on Mac

Posted by Katrina to Mac Data Recovery on February 23rd, 2018

Invalid node structure error is a sign of corrupt storage disk directory structure. It occurs on external hard drive, internal hard drive, SD card, USB card, memory card and other storage devices on Mac. In face of invalid node structure error, our storage devices turn to be unbootable and all enclosed files are inaccessible. If the problem happens on internal hard drive, our Mac computer will work slowly, and even frequently get stuck at the Apple Logo with the spinner.

Fortunately, we do have some great solutions and useful tools to handle this problem. In this post, we will get this issue resolved with the following two methods:

Solution 1: Repair invalid node structure error with fsck

Since Disk Utility has not fixed invalid node structure, the command line tool fsck should be our next choice, which reviews and repairs the underlying structure of a hard drive. We can follow the below steps to fix invalid node structure error with fsck:

Step 1: Restart our Mac computer.

Step 2: Hold down "Command+S".

Step 3: Some white text will scroll by quickly. When it stops, type in "/sbin/fsck –fy", then press "Enter".

Step 4: Type in "/sbin/fsck_hfs -fy /dev/drive letter (for example disk 2)". fsck will check the file system and attempt to repair any damage that it finds on hard drive.

Step 5: When fsck is finished checking and repairing the file system, type "reboot" into the command prompt and press "Enter". Then our Mac will reboot, returning us to the usual login screen.

Solution 2: Recover data from hard drive then fix invalid node structure error by reformatting

Since invalid node structure error is a file system problem, it can easily get fixed by reformatting through Disk Utility. But reformatting will erase all files stored on the hard drive. To avoid important data loss, we should recover data from hard drive at first. Here recommend a free Mac data recovery software - iBoysoft Mac Data Recovery.

iBoysoft Mac Data Recovery is the best Mac data recovery software that can recover data from hard drive which has invalid node structure, recover data from unreadable hard drive, recover data from unrecognized hard drive, recover data from corrupted hard drive, recover data from unmountable hard drive, recover data from inaccessible hard drive, recover data from uninitialized hard drive, etc. on macOS Mojave 10.14/High Sierra 10.13/10.12 Sierra/10.11/10.10/10.9/10.8/10.7.

Step 1: Recover data from hard drive which has invalid node structure

1. Free download and install iBoysoft Mac Data Recovery.

2. Connect hard drive to Mac and then launch iBoysoft Mac Data Recovery.

Recover data from hard drive which has invalid node structure

3. Select the hard drive where we have lost files and click "Next" to search for all lost files on the drive.

4. Preview the listed files, choose those we want, and click "Recover" to get them back.

Step 2: Fix/repair invalid node structure error by reformatting

After data recovery completed, we can fix/repair invalid node structure error on hard drive by reformatting

1. Launch Disk Utility.

2. Select the hard drive on the left part of the window.

3. Click Erase on the top of the window.

4. Complete related information (name, format, scheme), then click Erase.

If don't care about files on the hard drive or have backup at other place, we can perform reformatting directly.

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