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Note: For security, if the system is powered on by the remote power-on by ring
v Unattended start mode - refer to Enable/Disable Unattended Start Mode on page
33.
The service processor can be enabled to recover from the loss of ac power (see
Enable/Disable Unattended Power-On Mode in the "System Power Control Menu" on
page 33). When ac power is restored, the system returns to the power state at the
time ac loss occurred. For example, if the system was powered-on when ac loss
occurred, it reboots/restarts when power is restored. If the system was powered-off
when ac loss occurred, it remains off when power is restored.
v Timed power-on - refer to the shutdown -t command on servers using AIX.
Working in conjunction with AIX, the service processor in your server can operate a
timer, much like the wake-up timer on your clock radio. You can set the timer so that
your server powers on at a certain time after shutting down. The timer is battery
operated, so power interruptions occurring while the server is off do not affect its
accuracy. Refer to the AIX shutdown -t command for details on setting the timer.
Note: If an ac power loss is in progress when the timed power-on attempt occurs,
v Follow-up to a failed boot attempt
The service processor initiates a power-on sequence if a failed boot attempt is
detected (due to a hardware or software failure).
v Fast/Slow Boot (IPL) Capabilities
Using the service processor menus, you can select the IPL type, mode, and speed of
your system. For more information, refer to "System Power Control Menu" on
page 33.
Attention: Selecting fast IPL results in several diagnostic tests being skipped, and a
shorter memory test being run.
Service Processor Call-In Security
If the service processor detects bad battery-powered storage (indicating that the battery
on the system board has failed or has been removed), it maintains server security by
disabling the call-in capability to both serial ports.
When call-in is disabled, the system can still be powered on by using the ring-indicator
signal, but the service processor then causes the system to power down, preventing
access to any system facilities or to AIX.
After battery power is restored, the password(s) must be reset and the call-in function(s)
enabled. Both of these operations can be performed from service processor menus.
See "Serial Port Selection Menu" on page 42.
indicate signal and the service processor detects a battery failure, the service
processor causes the system to power off. See "Service Processor Call-In
Security" for more information.
the server cannot power on when ac power is restored.
Chapter 3. Using the Service Processor
47
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