How to manage the volume dirty bit
The FSUtil Dirty command checks or sets the dirty bit for a volume.
The system automatically performs an AutoChk (a boot time ChkDsk
equivalent) whenever it detects the dirty bit during startup. The AutoChk
utility looks for drive errors. You can repair drive errors using the
FSUtil Repair command.
Query Dirty Bit Status
The Query command determines whether the specified volume is dirty
(requires a check). To view the current status of a volume, type FSUtil
Dirty Query C: and press Enter (where C: is the volume you want to
check). The output tells whether or not the specified volume is dirty.
Set the Dirty Bit
The Set command lets you set the dirty bit for the specified volume. You
can use this command when you suspect a volume contains errors and
want to check it during the next boot cycle. To set the dirty bit, type
FSUtil Dirty Query C: and press Enter (where C: is the volume you
want to AutoChk). After you set the dirty bit, you can’t clear it, so setting
the dirty bit always results in a drive check during the next boot cycle.
