A volume’s dirty bit indicates that the file system may be in an inconsistent state. This can happen when:
- The volume is online and there are outstanding changes
- Changes were made to the volume but the computer was shut down before the changes were committed to the disk
The dirty bit is used to track which pages of a database have been modified but not yet written to disk. During recovery or system failure, the database system uses the dirty bit information to determine which pages need to be restored or written back to disk.
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