IBM eserver 630 6C4, Руководство по обслуживанию, Страница: 143 / 573

Chapter 4. Checkpoints
Checkpoints display on the media subsystem operator panel and the virtual terminal
while the system is powering on and going through the initial program load (IPL). This
chapter explains the IPL flow of the system and provides a table that lists checkpoints
that you might see in the operator panel and in a virtual terminal window on the HMC.
IPL Flow
The IPL process starts when ac power is connected to the system. The IPL process
has the following phases:
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Phase 1: Service Processor Initialization
Phase 1 starts when ac power is connected to the system and ends when OK is
displayed in the media subsystem operator panel. 8xxx checkpoints are displayed
during this phase. Several 9xxx codes may also be displayed. Service processor
menus are available at the end of this phase by striking any key on the console
keyboard.
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Phase 2: Hardware Initialization by the Service Processor
Phase 2 starts when system power-on is initiated by pressing the power on button on
the media subsystem operator panel. 9xxx checkpoints are displayed during this
time. 91FF, the last checkpoint in this phase, indicates the transition to phase 3 is
taking place.
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Phase 3: System Firmware initialization
At phase 3, a system processor takes over control and continues initializing partition
resources. During this phase, checkpoints in the form Exxx are displayed. E105, the
last checkpoint in this phase, indicates that control is being passed to the AIX boot
program.
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Phase 4: AIX Boot
When AIX starts to boot, checkpoints in the form 0xxx and 2xxx are displayed. This
phase ends when the AIX login prompt displays on the AIX console.
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