Sun Microsystems Fire 880, Руководство пользователя

Страница: 139 / 236

Chapter 6 Configuring System Firmware 121
Automatic System Shutdown
If the OpenBoot environmental monitor detects a critical fan failure or
overtemperature condition, it will initiate an automatic system shutdown sequence.
In this case, a warning similar to the following is generated to the system console:
If necessary, you can type Control-C to abort the automatic shutdown and return to
the system
ok
prompt; otherwise, after the 30 seconds expire, the system will power
off automatically.
Note – Typing Control-C to abort an impending shutdown also has the effect of
disabling the OpenBoot environmental monitor. This gives you enough time to
replace the component responsible for the critical condition without triggering
another automatic shutdown sequence. After replacing the faulty component, you
must type the
env-on
command to reinstate OpenBoot environmental monitoring.
Caution – If you type Control-C to abort an impending shutdown, you should
immediately replace the component responsible for the critical condition. If a
replacement part is not immediately available, power off the system to avoid
damaging system hardware.
OpenBoot Environmental Status Information
The OpenBoot command
.env
lets you obtain status on the current state of
everything of interest to the OpenBoot environmental monitor. You can obtain
environmental status at any time, regardless of whether OpenBoot environmental
monitoring is enabled or disabled. The
.env
status command simply reports the
current environmental status information; it does not take action if anything is
abnormal or out of range.
For an example of
.env
command output, see “How to Obtain OpenBoot
Environmental Status Information” on page 124.
WARNING: SYSTEM POWERING DOWN IN 30 SECONDS!
Press Ctrl-C to cancel shutdown sequence and return to ok prompt.