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12
C H A P T E R
OpenBoot PROM
This chapter discusses troubleshooting the Sun Ultra 45 or Ultra 25 workstation
using the OpenBoot PROM firmware. Topics covered are:
Section 12.1, "OpenBoot PROM Overview" on page 12-1
Section 12.2, "OpenBoot PROM Utilities" on page 12-2
Section 12.3, "OpenBoot Diagnostics" on page 12-6
Section 12.4, "OpenBoot PROM Messages" on page 12-11
12.1
OpenBoot PROM Overview
OpenBoot PROM is the core software installed on the Sun Ultra 45 and Ultra 25
workstation motherboard. This software enables the Sun Ultra 45 and Ultra 25
workstation to load an operating system. The operating system can be loaded from
an installed hard drive, the DVD-dual drive, the network, or from some external
boot device. Because the OpenBoot PROM software resides within the NVRAM, it is
called firmware.
The OpenBoot PROM plays a major role in starting the Sun Ultra 45 or Ultra 25
workstation (For details see: "Power-On Sequence" on page 7-6.) If an error occurs
during that process, a message is usually displayed. You can use OpenBoot
Diagnostics tools to help diagnose system problems.
The OpenBoot PROM also has a collection of in-depth testing programs, available
from the obdiag prompt. These testing programs are described in "OpenBoot
Diagnostics" on page 12-6.
12-1
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