Chapter 5 Introduction to Advanced Troubleshooting 5-5
TABLE 5-3 describes the diagnostic levels.
TABLE 5-4 describes the output verbosity.
5.5 OpenBoot PROM
5.5.1 OpenBoot PROM Overview
OpenBoot PROM is the core software installed on the Sun Blade 1500 motherboard.
This software enables the CPU, memory, I/O bridge, I/O subsystem, and other
motherboard components to perform minimal communication to initially boot the
Sun Blade 1500 workstation to a state where it can further load an operating system
from either an installed hard drive, an optical drive, the network, or from some
external boot device. Because this software is permanent to the motherboard
hardware, it is called firmware.
As seen in “Power-On Sequence” on page 3-1, the OpenBoot PROM plays a major
role in starting the Sun Blade 1500 workstation. If an error occurs during that
process, a message is likely to be displayed. The error might happen while the
OpenBoot PROM loads the Solaris operating system. Refer to
“Power-On Self-Test”
on page 7-1 for information about POST.
TABLE 5-3 POST Diagnostic Levels
POST Diagnostic Level Output
min Testing of CPU, cache, some memory, and I/O bridge chip.
max Same tests as min, with additional extensive memory testing.
TABLE 5-4 POST Output Verbosity
POST Output Verbosity Output
min Only “Executing Power On Self Test” is displayed.
normal Build information and test groups are indicated.
max Each step of POST is identified.
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