I am Joseph, having this strange issue with my Mac SSD. When I launch Disk Utility first aid from Disk Utility then it gives me a message – First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery. So, I restarted my Mac and went to Recovery Mode by press-holding Command + R. There, I launch Disk Utility Repair on my startup SSD, but still, Disk Utility greets me with the same message. Here is that message from recovery mode – First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery. Click Done to continue. Nothing happens further as I boot into the desktop.
Launch Terminal from Utilities within the Recovery Mode and type the below commands one by one:
diskutil verifyDisk /dev/disk0
- Now Repair your SSD/HDD by
diskutil repairDisk /dev/disk0
The commands will verify and repair your SSD or HDD errors through Terminal. After executing these commands go to Disk Utility (within recovery mode) and run the repair on your SSD. This time you shouldn’t receive the issue of the error message: First Aid found corruption that needs to be repaired. To repair the startup volume, run First Aid from Recovery.
Don’t type commands vaguely in Terminal
Do backup your SSD and its data before executing disk related operations under Terminal. A single terminal command if executed incorrectly can ruin your SSD or invite unexpected data losses. Data recovery on SSD is possible though one should be careful and avoid data loss events as much as possible. That’s why, back up your Mac before going to verify, repair or format your Mac SSD / Hard Drive.
For Other Disk Errors on Mac
Disk Utility is a great tool to fix wear & tears of directory structure however the program has several limitations. Those Disk Utility limitations are:
- Rebuilding directory structure
- Repairing severely damaged permissions
- Unable to boot when severely corrupt
- No additional bootable unit
When Disk Utility & Recovery Mode Fails!
Due to a severe corruption of Mac hard drive (SSD or volumes), the Disk Utility (no matter Recovery Mode or Desktop Disk Utility) will ask you to backup the data and format the storage unit. Else, you will need to reinstall the macOS afresh. Taking the backup of an already corrupt storage unit is challenging task, and any clone/image software can fail while copying files. No backup tools guarantee the cloning of a corrupt hard drive accurately. Thankfully, there exists an optimum solution for SSD and hard drive recovery for Macs.
Dealing with disk errors is like playing with fire. One has to be a vigilante and one must assure that backups are in place. However, when the disk is badly damaged then leveraging Disk Utility should be the first step. You can also check your hard drive errors with Single User Mode. Nonetheless, don’t shy away from trying data recovery apps on your SSD when all means to repair the SSD give up.