The chkfsys utility is your principal filesystem-maintenance tool.

For details about this tool, see chkfsys in the Utilities Reference.

Note: The chkfsys utility will claim that a Power-Safe filesystem is corrupt; use chkqnx6fs on this type of filesystem.

The chkfsys utility:

The chkfsys utility assumes that the root block is valid. If the root block isn't valid, chkfsys complains and gives up—you'll need to try restoring the root block with the dinit utility.