When I use Disk Utility First Aid to check the boot SSD, it fails with the error, “File system check exit code is 8.” The SSD isn’t one year old yet, so it’s concerning. I have backed up the SSD in case something like that may happen. What should I do now?
The error “File system check exit code is 8” indicates your disk has a corrupted file system and is unable to be repaired by First Aid.
If you ran First Aid in regular mode, I suggest you re-run it in macOS Recovery and do it for several times. If the error persists, use the fsck command in Single User Mode to repair the corrupted file system. Here’s how:
- Shut down your Mac.
- Turn it on, then immediately press and hold Command + S.
- Once in Single User Mode, run the command below.
fsck –fy - If you get a message “File system was modified,” run it again until you see “The volume (name) appears to be OK.”
- Execute the following command to exit Single User Mode.
reboot
If you’re really concerned about your SSD drive and it’s affecting your work, wipe it clean and reinstall macOS. This is probably the most efficient way to fix file system corruption.