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v If the diagnostics were loaded from disk or a server, you must shut down the AIX
operating system before powering off the system unit to prevent possible damage to
disk data. This is done in one of two ways:
– If the diagnostic programs were loaded in Standalone mode, press the F3 key
until DIAGNOSTIC OPERATING INSTRUCTIONS displays; then follow the
displayed instructions to shut down the AIX operating system.
– If the diagnostic programs were loaded in maintenance or concurrent mode, enter
the shutdown -F command.
v Under some conditions the system may stop, with instructions displayed on attached
displays and terminals. Follow the instructions to select a console display.
Running the Diagnostics from a TTY Terminal
Consider the following when you run diagnostics using a TTY-type terminal as the
console display:
v See the operator manual for your type of TTY terminal to find the key sequences you
need to respond to the diagnostics. For the 3151, refer to the 3151 ASCII Display
Station Guide to Operations , form number GA18-2633. For the 3164, refer to the
3164 ASCII Color Display Station Description , form number GA18-2617.
v When the diagnostics present display information through the S1 serial port, certain
attributes are used. These attributes are set as if the diagnostics were using a 3161
display terminal. Refer to the tables in Appendix C, "General Attributes Required
When Using a TTY Terminal" on page 163 for a list of attributes for the 3161 ASCII
Display Terminal and for two other ASCII display terminals commonly used with the
system.
v If you have a TTY terminal other than a 3151, 3161 or 3164 attached to the S1 serial
port, your terminal may have different names for the attributes. Refer to the tables in
Appendix C, "General Attributes Required When Using a TTY Terminal" on page 163,
and use the attribute descriptions to determine the settings for your terminal.
Online Diagnostics Mode of Operation
The Online diagnostics can be run in three modes:
v Service Mode allows checking of most system resources.
v Concurrent Mode allows the normal system functions to continue while selected
resources are being checked.
v Maintenance Mode allows checking of most system resources
Running the Online Diagnostics in Service Mode (Service Mode IPL)
Service mode provides the most complete checkout of the system resources. This
mode also requires that no other programs be running on the system. All supported
system resources except the SCSI adapter, and the disk drives used for paging can be
tested. However, the system memory and the processor are only tested during
power-on self-test (POST).
Error log analysis is done in service mode when you select the Problem
Determination option on the DIAGNOSTIC MODE SELECTION menu.
Chapter 5. Using the Standalone and Online Diagnostics
97
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