When you power on the system, the boot process begins under the control of the Integrated Lights Out Manager (ILOM) system console. The system console displays status and error messages generated by firmware-based tests during system startup.
Note - To see these status and error messages, connect a terminal or terminal emulator to the serial management port (SER MGT). For a basic procedure to connect a terminal or terminal emulator, see Power On the System for the First Time.
For a more detailed discussion on configuring the system console and connecting terminals, refer to the SPARC Enterprise T5120 and T5220 Server Administration Guide.
Sun SPARC Enterprise T5120 and T5220 Servers Administration Guide