User`s guide

5-5
Using the Online and Standalone Diagnostics
Maintenance Mode
Maintenance mode runs the Online Diagnostics using the customer’s version of the AIX
operating system. This mode requires that all activity on the AIX operating system be
stopped so the Online Diagnostics have most of the resources available to check. All of the
system resources except the SCSI adapters, memory, processor, and the disk drive used for
paging can be checked.
Error log analysis is done in maintenance mode when you select the Problem Determination
option on the DIAGNOSTIC MODE SELECTION menu.
Use the shutdown –m command to stop all activity on the AIX operating system and put
the AIX operating system into maintenance mode. The diag command is then used to
invoke the diagnostic controller so you can run the diagnostics. After the diagnostic
controller is loaded, follow the normal diagnostic instructions.
Running the Online Diagnostics in Maintenance Mode
To run the Online Diagnostics in maintenance mode, you must be logged on to the
customer’s version of the AIX operating system as root or superuser (su). Use the following
steps to run the Online Diagnostics in maintenance mode:
1. Stop all programs except the AIX operating system (if help is needed, see the system
operator).
2. Log on to the AIX operating system as root or superuser (su).
3. Enter the shutdown –m command.
4. When a message indicates the system is in maintenance mode, enter the diag
command.
Note: It might be necessary to set TERM type again.
5. When DIAGNOSTIC OPERATING INSTRUCTIONS screen displays, follow the
displayed instructions to check out the desired resources.
6. When testing is complete, use the F3 key to return to DIAGNOSTIC OPERATING
INSTRUCTIONS. Press the F3 key again to return to the AIX operating system prompt.
7. Press Ctrl–D to log off from root or superuser.
Standalone Disgnostic Operation
Use Standalone Diagnostics to test the system when the Online Diagnostics are not
installed and as a method of testing the disk drives that cannot be tested by the Online
Diagnostics.
Note: No Error Log Analysis is done by the Standalone Diagnostics. The CD–ROM drive
and the SCSI controller that controls it cannot be tested by the Standalone
Diagnostics
Running the Standalone Diagnostic
To run Standalone Diagnostics in service mode, use the following steps:
1. Verify with the system administrator and system users that the system unit may be shut
down. Then stop all programs including the AIX operating system. (Refer to the AIX
operating system documentation for shutdown command information.)
2. Remove all tapes, diskettes, and CD–ROMs.
3. Insert the Diagnostic CD into the CD–ROM drive.
4. Turn off the system unit.