Power-on self-test
When you turn on the SAN Volume Controller, the system board performs self-tests. During the initial tests, the hardware boot symbol is displayed.
All models perform a series of tests to check the operation of components and some of the options that have been installed when the units are first turned on. This series of tests is called the power-on self-test (POST).
If a critical failure is detected during the POST, the software is not loaded and the system error LED on the operator information panel is illuminated. If this failure occurs, use MAP 5000: Start to help isolate the cause of the failure.
When the software is loaded, additional testing takes place, which ensures that all of the required hardware and software components are installed and functioning correctly. During the additional testing, the word Booting is displayed on the front panel along with a boot progress code and a progress bar. If a test failure occurs, the word Failed is displayed on the front panel.
The service controller performs internal checks and is vital to the operation of the SAN Volume Controller. If the error (check) LED is illuminated on the service controller front panel, the front-panel display might not be functioning correctly and you can ignore any message displayed.
The uninterruptible power supply also performs internal tests. If the uninterruptible power supply reports the failure condition, the SAN Volume Controller displays critical failure information about the front-panel display or sends noncritical failure information to the event log. If the SAN Volume Controller cannot communicate with the uninterruptible power supply, it displays a boot failure error message on the front-panel display. Further problem determination information might also be displayed on the front panel of the uninterruptible power supply.