help message when in simulation mode

weed/shell/command_volume_check_disk.go

@@ -51,6 +51,7 @@ func (c *commandVolumeCheckDisk) Do(args []string, commandEnv *CommandEnv, write
 	if err = fsckCommand.Parse(args); err != nil {
 		return nil
 	}
+	infoAboutSimulationMode(writer, *applyChanges, "-force")
 
 	if err = commandEnv.confirmIsLocked(args); err != nil {
 		return