112 Sun Fire V890 Server Owner’s Guide • September 2004
Reset Scenarios
The system keyswitch position and two OpenBoot configuration variables,
diag-switch? and diag-trigger, control whether and how the system runs
firmware diagnostics in response to system reset events.
When you set the system keyswitch to the Diagnostics position, the system is in
service mode and runs tests at Sun-specified levels, ignoring the settings of
OpenBoot configuration variables.
Setting the diag-switch? variable to true also puts the system in service mode,
producing exactly the same results as setting the system keyswitch to the Diagnostics
position.
Note – Auto-booting is disabled when the system is in service mode.
When you set the system keyswitch to the Normal position, and when the OpenBoot
diag-switch? variable is set to false (its default value), the system is in normal
mode. When the system is in this mode, you can control diagnostics and auto-boot
behavior by setting OpenBoot configuration variables, principally diag-trigger.
The following table describes the various settings (keywords) of the diag-trigger
variable. You can use the first three of these keywords in any combination.
Normal Mode and Service Mode Information
You will find a full description of normal and service modes, as well as detailed
information about the OpenBoot configuration variables that affect ASR behavior, in
OpenBoot PROM Enhancements for Diagnostic Operation, which is available on the
Sun Fire V890 Documentation CD.
Keyword Function
power-on-reset
(default)
Reset caused by power-cycling the system.
error-reset
(default)
Reset caused by certain hardware error events, such as a RED State
Exception, Watchdog Reset, or Fatal Resets.
user-reset Reset caused by operating system panics or by user-initiated
commands from OpenBoot (reset-all, boot) or from Solaris OS
(reboot, shutdown, init).
none Diagnostic tests are not executed.
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