The Diagnostics Utility is embedded in the system ROM, and provides a pre-boot method for quickly checking the validity of the three major subsystems of the server needed to boot an operating system. A complete server diagnostics is available on the SmartStart CD.
All three of these tests should pass if a bootable operating system is installed on the server.
If any test fails, there may be a problem booting the server. To run the Diagnostics Utility, select Diagnostics Utility from the System Maintenance menu.