chkdsk drive /p /r
This command (where drive specifies the drive to check) checks the drive, and if needed, repairs or recovers the drive. It also marks bad sectors and recovers readable information.
- The /p switch instructs CHKDSK to do an exhaustive check of the drive even if the drive is not marked with problems, and then corrects any errors that are found.
- The /r switch locates bad sectors and recovers readable information. Note that if you specify the /r switch, the /p switch is implied.
The chkdsk command may be specified without arguments, in which case the current drive is implied with no switches. Optionally, the listed switches are accepted.
The chkdsk command requires the Autochk.exe file. Chkdsk automatically locates this file in the bootup folder. Typically, this folder is the Cmdcons folder if the Command Console was pre-installed.
If the folder cannot be found in the bootup folder, Chkdsk tries to locate the Windows CD-ROM installation media. If the installation media cannot be found, Chkdsk prompts you to provide the location of the Autochk.exe file.
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