Disk First Aid is a utility which verifies the directory structure of any Hierarchial File System (HFS) based storage volume. Many hard disk drives, floppy disk and Compact Disk (CD) drives are examples of HFS-based storage volumes.
If imperfections are found within a volume Disk First Aid can be used as a "first step" to repair the defects. If a volume has suffered severe corruption other utility programs or repair methods may need to be used.
Running Disk First Aid:
Click on the volume you would like to verify or repair. Multiple volumes can be selected by holding down the Shift key while clicking on the volumes.
Select the Verify button to begin a verification process or the Repair button to verify and repair the selected volume(s).
Note: Some volumes can be verified but not repaired. For example, the startup disk, the Disk First Aid disk (the volume where DFA resides), a write-protected disk or a disk which has open files can all be verified, but not repaired. Disk First Aid will warn you if one of these conditions exist when you select a volume.
The verify or repair process can be stopped at anytime by clicking on the Stop button.
The results of a verification and/or repair will be posted in this window.
