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After the required cables are installed, and the power cables are connected, the power
button on the primary I/O drawer operator panel can be pushed to initialize the system.
Progress indicators, also referred to as checkpoints , are visible on the primary I/O
drawer operator panel display and the power LED on the primary I/O drawer stops
blinking and stays on, indicating the system power is on.
The CEC drawer and secondary I/O drawers are powered on through the primary I/O
drawer system power control network (SPCN). When power is applied, the power LEDs
on the CEC drawer and primary I/O drawer go from blinking to on continuously, and the
power LED on the secondary I/O drawer comes on and stays on. This indicates that
power levels are satisfactory in the drawers.
If the system is operating under AIX, type the shutdown command to power off the
system. If you cannot use this method, you can power off the system by pressing the
primary I/O drawer operator-panel power button.
Attention:
cause unpredictable results in the data files, and the next IPL will take longer to
complete.
For complete details on how to power on and off the system, go to "Powering Off and
Powering On the System" on page 429 and "System Power-On Methods" on page 398.
Console Strategy
The firmware starts a console-selection sequence at system boot time if any of the
following is true:
v A console has not yet been selected.
v A previous console-selection sequence timed-out.
v A change in the system configuration affects the console (keyboard
installed/removed, mouse installed/removed, graphics adapter installed/removed or
moved to another PCI slot).
The console-selection sequence allows you to select (from the appropriate input device)
any one of the available console devices. If no console is selected within approximately
60 seconds, serial port 1 (S1) is selected as the console and the selection sequence
times-out.
Attention:
interaction with this terminal, then:
v After OK displays in the operator panel
AND
v Before the power-on sequence is initiated
the firmware will use this terminal as the console, regardless of the previous console
selection.
Using the operator-panel power pushbutton to power off the system can
If an ASCII terminal is attached to serial port 1 (S1), and there is any
Chapter 1. Reference Information
5
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