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Sun Fire V480 Server Administration Guide • February 2002
the deadlock that is hanging up the system, but it also precludes the orderly
shutdown of applications, and so is not the preferred method of reaching the
ok
prompt.
Manual System Reset
Reaching the
ok
prompt by performing a manual system reset should be the method
of last resort. Doing this results in the loss of all system coherence and state
information. In particular, it resets all OpenBoot configuration variables to their
default values, so if you have edited these variables, your changes will be lost. It also
corrupts the machine’s file systems, although the
fsck
command usually restores
them. Use this method only if nothing else works.
Caution –
Forcing a manual system reset results in loss of system state data.
For More Information
For more information about the OpenBoot firmware, see:
■
OpenBoot 4.x Command Reference Manual
An online version of the manual is included with the
OpenBoot Collection
AnswerBook
that ships with Solaris software.
About OpenBoot Environmental
Monitoring
Environmental monitoring and control capabilities for Sun Fire V480 systems reside
at both the operating system level and the OpenBoot firmware level. This ensures
that monitoring capabilities are operational even if the system has halted or is
unable to boot. Whenever the system is under OpenBoot control, the OpenBoot
environmental monitor checks the state of the system power supplies, fans, and
temperature sensors periodically. If it detects any voltage, current, fan speed, or
temperature irregularities, the monitor generates a warning message to the system
console.
For additional information about the system’s environmental monitoring
capabilities, see “Environmental Monitoring and Control” on page 23.
Summary of Contents for Sun Fire V480
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