The diag command loads the diagnostic controller and displays the online diagnostic
menus.
Running the Online Diagnostics in Concurrent Mode
To run online diagnostics in concurrent mode, use the following steps:
1. Log in to the AIX operating system as root user or use CE Login.
2. Enter the diag command.
3. When the DIAGNOSTIC OPERATING INSTRUCTIONS display, follow the
instructions to check out the desired resources.
4. When testing is complete, use the F3 key to return to the DIAGNOSTIC
OPERATING INSTRUCTIONS. Press the F3 key again to return to the AIX
operating system prompt. Be sure to vary on any resource that you had varied to
off.
5. Press the Ctrl-D key sequence to log off from root user or CE Login.
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 partition running the AIX
operating system be stopped so that 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.
The AIX Documentation library is available at the following Web address:
http//www.ibm.com/servers/aix/library/. Select Technical Publications. AIX
documentation is also contained on the AIX Documentation CD. This documentation is
made accessible by loading the documentation CD onto the hard disk or by mounting
the CD in the CD-ROM drive.
Running the Online Diagnostics in Maintenance Mode
Use the following steps to run the online diagnostics in maintenance mode:
1. Stop all programs running on the partition except the AIX operating system (if help
is needed, see the system operator).
2. Log in to the AIX operating system as root user or use CE Login.
3. Type 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.
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