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Error while checking the file system

If the disk name contains an ampersand ("&"), remove it. This character sometimes creates an error.

If OnyX detects an error while verifying the structure of the disk, be sure to repair it as soon as possible.

To repair a disk:

1

Restart the computer while holding down Command-R until the macOS Utilities pane appears.

2

In the macOS Utilities window, select Disk Utility, and click the Continue button.

3

In the left column, select your startup disk.

4

In the First Aid tab located at right, click the Repair Disk button and wait.

5

Then restart normally.

The errors are often not serious, and they are usually corrected by Disk Utility. Nevertheless, more serious errors can require that you use a third–party application (Drive Genius, DiskWarrior, TechTool Pro, and so on).

IMPORTANT: Sometimes, the disk needs to be repaired, but when attempting to repair it, Disk Utility finds no problem. This is caused by a Disk Utility issue that does not recognize all errors. Then you will need to repair the disk using the fsck command in single-user mode.


To repair a disk with fsck:

1

Start up your computer in single-user mode by holding down Command-S.

2

At the command-line prompt enter:

/sbin/fsck -fy

Press Return. fsck will go through five "phases" and then return information about your disk's use. After it finishes, it will display this message if no issue is found:

** The volume (name_of_volume) appears to be OK.

If fsck finds issues and alters, repairs, or fixes anything, it displays this message:

***** FILE SYSTEM WAS MODIFIED *****

If this message appears, repeat the fsck command until fsck tells you that your volume appears to be OK. (First-pass repairs may uncover additional issues, so this is a normal thing to do.)

3

When fsck reports that your volume is OK, enter:

reboot

at the prompt, and then press Return to restart normally.

WARNING: Your Mac can't start up in single-user mode if the computer owner or a user with an administrator account has set a firmware password.
If FileVault is turned on, you need to unlock the startup disk as part of this process. White text appears briefly before the FileVault login screen is shown. After selecting a user and entering the user’s password, the single-user mode startup process continues.

Related Topics


Sistem file