simple tips that very usefull

1. Find if a disk drive is dirty : You can find if the dirty flag for a drive letter is turned on at the present time, by giving command chkntfs X:, where the X: is the drive letter you want to check the dirty flag for.
   
2. Find the autocheck time countdown : You can find out the AUTOCHK timer countdown shown at Windows boot up when checking a disk for errors. The default time is 10 seconds. The command line is chkntfs /T
   
3. Set the autocheck timer countdown : You can change the AUTOCHK timer countdown shown at Windows boot up. The default time is 10 seconds. The command line is chkntfs /T:time wheretime is the time in seconds.
   
4. Schedule a drive to be checked on next reboot : You can manually set a drive to be checked at the Windows boot up. The command line is chkntfs /C X: where X: is the drive letter of the drive you want to schedule to be checked.
   
5. Restore all settings to default : You can restore all the settings to their default. The command line is chkntfs /D.