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2.4 Hardware Installation Overview
Shutting Down the System
Caution: To avoid damaging internal circuits, do not disconnect or plug in any cable while power is applied
to the system.
Warning: Record NVRAM configuration parameters (especially those that are non-standard) before
installing the new boot PROM(s), as the new boot PROM(s) will reset values to the default setting. To print
NVRAM configuration parameters type:
eeprom | lp
(for systems running Solaris 2.x) or
eeprom | lpr
(for systems running SunOS)
Resetting NVRAM parameters to their defaults includes turning on diagnostic mode and setting the default
diagnostic boot device to network.
Use the following command to turn off the diagnostic switch:
setenv diag–switch? false
Note: Replacing the boot PROM will not change the system’s host id.
Before you turn off the system power, you must halt the operating system or loss of data can occur. To shut
down the system and give users a shutdown warning:
1. Back up the system files and data to tape, if necessary.
2. Notify users that the system is going down.
3. Halt the system using the appropriate commands.
4. Wait for the system-halted message and the boot monitor prompt.
5. Turn off the system power in this order:
d. External drives (if connected)
e. System unit
f. Monitor
If you require more specific information about turning off the system power, refer to the hardware service
manual for your system.
Caution: Turn off the power at the main AC power switch before you insert or remove boards and disk drives.
Do not disconnect the AC power cord from its receptacle.