The chkdsk command is also available inAdvanced Startup OptionsandSystem Recovery Options.
It works from within the Recovery Console in Windows 2000 and Windows XP.
Chkdsk is a DOS Command, too, available in most versions of MS-DOS.

The availability of certain chkdsk command switches and other chkdsk commandsyntaxmight differ from operating system to operating system.
The/offlinescanandfixoption is the same as/Fexcept that it’s only allowed on NTFS volumes.
Chkdsk Related Commands
Chkdsk is often used with many other Command Prompt commands andRecovery Console commands.