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How to Fix "File System Verify or Repair Failed" on Mac


"File System Verify or Repair Failed" error happens mostly on external hard drives because of the damaged hard drive. Such error may also lead to data loss.
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First Aid in Disk Utility is a Mac built-in tool to detect and repair hard disk. Whenever we find any problem on disk, the first solution is to run First Aid. But First Aid can only repair some minor errors. It can't repair some tough problem due to serious file system corruption, such as the "file system verify or repair failed" issue.
When meeting the "file system verify or repair failed" error on external hard drive, don't panic. Calm down and recover data first.

How to recover data from the hard disk

Bitwar Data Recovery for Mac is a professional Mac data recovery software that can restore lost data from the disk with only a few simple clicks. The program can also be applied in various data loss situations. For example, system crash, disk formatting, virus attack, file deletion and other unknown reasons on mac. Anyway, some day when you unfortunately face data loss issues, you can turn to Bitwar Data Recovery for help.

Steps to recover data Bitwar Data Recovery for Mac

Download and install Bitwar Data Recovery for Mac by clicking the icon below, and then launch it on your Mac OS X. The software is compatible with OS X 10.11 and later.
Tips: For latest macOS 10.13 (High Sierra) system requirements, Mac users are not allowed in the access to system disk from apps. If you want to recover data from the system disk, please disable the system feature "System Integrity Protection (SIP)" , follow the guide on How to Disable System Integrity Protection (SIP) in macOS High Sierra (macOS 10.13)

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Step 1: Select the disk

Launch the program and select the disk where the corrupted file system in and then click "Next". If you want to recover data from an external drive, please connected it to your mac and select it on this step.

Step 2: Select the Scan Mode

Select "Quick Scan" mode and then click "next". There are three scan modes for you to choose on this step, if the "Quick Scan" mode cannot find your lost important data, you can try "Deep scan" to scan again.
● Quick Scan mode can recover deleted files on a partition or device, such as files deleted by command + deleted, emptied from the trash or deleted by other software, etc. If files have not been overwritten by other data, it can be retrieved completely in condition of the files or directory structures.
● Formatted recovery: Recover formatted files after performed a quick format on a partition or hard drive in condition of the capacity of partition or drive haven't been changed before or after formatting.
● Deep scan: If previous scan doesn't work, try deep scan this time. Deep scan will search every sector of hard drive to find all existing files. But the scanning process will spend more time than quick scan and will not retain the original file name in the scanning results.

Step3: Select the file type

Choose the file types and click "Next". You can select all types if you do not know which type of files you want.

Step 4: Preview, recover and save files

After scanning, you can quickly filter the data you want and preview them. Select the files you want and press the recover button to have them saved to other disk.
Through the above steps, the lost data are all restored, then you can fix the "file system verify or repair failed" issue.

How to fix "file system verify or repair failed" error?

Solution 1: Fix "file system verify or repair failed" error via FSCK command

If Disk Utility is unable to repair a hard disk, then FSCK command line should be your next choice, which is a tool for checking the consistency of a file system.
Step 1: Restart our Mac compute and hold down "Command+S".
Step 2: Some white text will scroll by quickly. When it stops, type in "/sbin/fsck –fy", then press "Enter".
Step 3: 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 4: After checking and repairing the file system, type "reboot" into the command prompt and press "Enter" to reboot mac.

Solution 2: Fix "file system verify or repair failed" by reformatting

After external hard drive data recovery completed, we can reformat the drive so that it can be usable again.
1. Launch Disk Utility.
2. Select the external 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" to reformat the drive.
By following the above-mentioned solution, you can easily resolve the issue.

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