Which of the following statements about N8500 troubleshooting is incorrect?

Which of the following statements about N8500 troubleshooting is incorrect?

A. Check file system configurations, and then check storage device configurations. B. Check network connection, and then check NAS device configurations. C. Check device indicators, and then check system logs. D. Check the status of storage unit disk enclosures, and then check the status of storage unit controller enclosures.