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Phase Change (Init to Maint)
The maintenance phase is entered from the Init phase if the system key is in service mode.
If the BUMP console present flag is set, the MAINTENANCE MENU is displayed on the
BUMP console, and the system waits for an operator action. The maintenance menu
choices are described on page 3-21. Various maintenance tasks can be performed from this
menu. When maintenance tasks are complete, the system can be booted, powered down, or
Phase Change (Maint to Boot)
SystemGuard enters the Boot phase from either the Init phase or the Maintenance phase. In
this phase the system is initialized and control of the system is passed to the operating
Phase Change (Boot to AIX Load and Run-Time)
Similar to the entry into the Init phase, there is a distinct line when entering this phase. At
this line, SystemGuard gives up control of the system and passes it to the loaded code
(AIX). This is indicated by the three-digit code 299 on the consoles and Operator Panel.
Since SystemGuard is also giving up control of the two serial lines, nothing can be displayed
on the consoles. The usual three-digit boot indicators are still displayed on the Operator
Panel. Note that the code 570 virtual SCSI devices being configured can take
several minutes for each card in the SMP system.
When the boot indicators have reached c33, AIX has progressed enough to display its own
boot messages on the system console. However, this is no longer the SystemGuard
Console; it is the AIX console.

SystemGuard Parameters and Flags

A certain number of SystemGuard parameters and flags can be changed through different
SystemGuard menus, from the Diagnostics interface and from AIX. Basically, there are four
different groups of flags:
Service contract flags These flags enable Service Console usage, maintenance usage
Diagnostics flags
Modem and Site Configuration flags
Phone numbers flags These are the dial-in and dial-out phone numbers and the operator
and determine if dial-out messages are to be sent to IBM or to a
Customer Service Center. These flags are stored in the SID
(System Identification) field of the System EEPROM.
These flags are used to control the service, diagnostics and
maintenance from a customer point of view. For example, the
customer can modify one of these flags to authorize setting the
Electronic Key from the Service Console or to authorize the dial-out.
These flags allow the customer to customize modem configuration
for the Service Console.
voice number.
Using SystemGuard


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