IBM RS/6000 44P - Manual (Page 127)

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 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 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 D. General Attributes Required
When Using a TTY Terminal” on page 167 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 port,
your terminal may have different names for the attributes. Refer to the tables in
“Appendix D. General Attributes Required When Using a TTY Terminal” on page 167.
Use the attribute descriptions listed there to determine the settings for your terminal.
Online Diagnostics Modes
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.
Service Mode
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 system
resources except the SCSI adapter and the disk drives used for paging can be tested.
However, note that system memory and the processor are only tested during POST.
Error log analysis is done in service mode when you select the Problem Determination
option on the DIAGNOSTIC MODE SELECTION menu.
To run Online diagnostics in service mode, use the following steps:
1. Stop all programs, including the AIX operating system.
2. Remove all tapes, diskettes, and CD-ROM discs.
3. Turn off the system unit’s power.
4. Turn on the system unit’s power.
5. After the first POST indicator displays on the system unit’s console, press F6 on
the directly attached keyboard or 6 on the TTY keyboard to indicate that
diagnostics are to be loaded.
Chapter 5. Using the Standalone and Online Diagnostics 109