I am in a midst of trouble where Disk Utility is failing to repair the drive. It gives me message "Error: Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files". Now, what should I do to fix this error without losing data on my drive?
"Disk Utility can't repair this disk" error usually appears when you're using Disk Utility to repair a disk problem but failed. Though frustrating, but it doesn't mean you will be necessarily lose all files. In this article, we will give you effective solutions to fix Disk Utility can't repair this disk error, no matter you're facing Disk Utility can't repair external hard drive error, or Disk Utility can't repair Macintosh HD error on Mac.
How to fix Disk Utility can't repair this disk error?
If Disk Utility failed to repair a disk and you received this message: "Error: Disk Utility can't repair this disk. Back up as many of your files as possible, reformat the disk, and restore your backed-up files", you'd better firstly follow its suggestion to back up files on that disk to avoid further data loss. Then, try to fix the disk that Disk Utility unable to repair by reformatting or some other methods.
Step 1: Back up or recover data from this disk.
Method 1: Back up with Time Machine.
1. Connect an external storage device with enough free space to your Mac.
2. A notification will popup and ask if you want to use this device to back up with Time Machine. Click on Use as Backup Disk.
Method 2: Recover data from the disk that Disk Utility can't repair.
If you can't back up files from that disk with Time Machine, you should try to recover files with reliable data recovery software, like iBoysoft Mac Data Recovery.
iBoysoft Mac Data Recovery is professional data recovery software for Mac that is able to recover data from not showing up external hard drives, unreadable USB drives, Pen drives, corrupted SD cards, memory cards as well as other unmountable, unreadable, inaccessible, formatted external storage devices. It can also recover data from unmountable macOS partitions, encrypted APFS boot volume, etc.
Through only 4 steps, you can recover data from the disk that Disk Utility can't repair.
1. Download and install iBoysoft Mac Data Recovery.
2. Launch iBoysoft Mac Data Recovery.
3. Select the disk and click "Next" button to scan all lost data.
4. Preview the searching results, choose files you need, and click "Recover" to get them back.
Step 2: Fix Disk Utility can't repair this disk error.
Method 1: Fix Disk Utility can't repair this disk error in Single User Mode.
If Disk Utility can't repair this disk, you can also repair external hard drive with Mac Terminal. fsck is a powerful command line to verify and repair corrupted file system.
1. Restart your Mac and, before the Apple logo appears, hold down Command and S keys. This will boot your Mac into Single User Mode.
2. Type in: /sbin/fsck -fy.
3. If you see "File system was modified", then re-type in the command again until you see "The volume _ appears to be OK".
4. Type in reboot to restart your Mac.
Method 2: Fix Disk Utility can't repair this disk error by reformatting.
If you failed to fix the disk using Single User Mode, then, you have to reformat it just as Disk Utility suggested.
1. Go to Applications > Utilities > Disk Utility.
2. Select the external hard drive and click "Erase" on the top.
3. Provide a name and a format to format the drive.
4. Wait until the process finished.
After reformatting to fix Disk Utility can't repair this disk error, you can restore your backed-up or recovered files to the disk again. If Disk Utility First Aid still failed on external hard drives, you may need to sent it to a local reparation center.