Stage 3: ChkDsk verifies the security descriptors for each volume During stage 3, ChkDsk examines each of the security descriptors associated with each file and directory on the volume by verifying that each security descriptor structure is well formed and internally consistent. The percentage complete that ChkDsk displays during this phase is the percentage of the number of files and directories on the volume that are checked.
The percentage complete indicator advances relatively smoothly throughout this phase, although some unevenness might occur.