Error-log analysis is done in concurrent mode when you select theProblemDetermination option on the DIAGNOSTIC MODE SELECTION menu.To run the Online diagnostics in concurrent mode, you must be logged in to the AIXoperating system and have the appropriate proper authority to issue the commands.The diag command loads the diagnostic controller and displays the Online diagnosticmenus.Running the Online Diagnostics in Concurrent ModeTo run Online diagnostics in concurrent mode, use the following steps:1. Log in to the AIX operating system as root user.2. Enter the diag command.3. When the DIAGNOSTIC OPERATING INSTRUCTIONS displays, follow theinstructions to check out the desired resources.4. When testing is complete, use the F3 key to return to the DIAGNOSTICOPERATING INSTRUCTIONS. Then press the F3 key again to return to the AIXoperating system prompt. Be sure to vary on any resource you had varied to off.5. Press the Ctrl-D key sequence to log off from root user.Maintenance ModeMaintenance mode runs the Online diagnostics using the customer’s version of the AIXoperating system. This mode requires that all activity on the AIX operating system bestopped so the Online diagnostics have most of the resources available to check. All ofthe system resources except the SCSI adapters, memory, processor, and the disk driveused for paging can be checked.Error-log analysis is done in maintenance mode when you select the ProblemDetermination option on the DIAGNOSTIC MODE SELECTION menu.The shutdown -m command is used to stop all activity on the AIX operating systemand put the AIX operating system into maintenance mode. The diag command is usedto invoke the diagnostic controller so you can run the diagnostics. After the diagnosticcontroller is then loaded, follow the normal diagnostic instructions.Running the Online Diagnostics in Maintenance ModeTo run the Online diagnostics in maintenance mode, you must be logged in to thecustomer’s version of the AIX operating system as root user and use the shutdown -mand diag commands. Use the following steps to run the Online diagnostics inmaintenance mode:1. Stop all programs except the AIX operating system.2. Log in to the AIX operating system as root user.3. Enter the shutdown -m command.4. When a message indicates system is in single-user mode, enter the diag command.Note: It may be necessary to setTERM type again.Chapter 5. Using the Standalone and Online Diagnostics 111
