Error-log analysis is done in concurrent mode when you select the Problem Determination option on theDIAGNOSTIC MODE SELECTION menu.To run the online diagnostics in concurrent mode, you must be logged in to the AIX operating system andhave proper authority to issue the commands (if help is needed, see the system operator).The diag command loads the diagnostic controller and displays the online diagnostic menus.Running the Online Diagnostics in Concurrent ModeTo run online diagnostics in concurrent mode, do the following: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 thedesired resources.4. When testing is complete, use the F3 key to return to the DIAGNOSTIC OPERATINGINSTRUCTIONS. Press the F3 key again to return to the AIX operating system prompt. Be sure tovary on any resource that you had varied to off.5. Press Ctrl-D to log off from root user or CE Login.Maintenance ModeMaintenance 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 thatthe online diagnostics have most of the resources available to check. All of the system resources, exceptthe 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 onthe DIAGNOSTIC MODE SELECTION menu.Use the shutdown -m command to stop all activity on the AIX operating system and put the AIX operatingsystem into maintenance mode. The diag command is then used to invoke the diagnostic controller so youcan run the diagnostics. After the diagnostic controller is loaded, follow the normal diagnostic instructions.Documentation for the AIX operating system is available from the IBM Eserver pSeries InformationCenter at http://publib16.boulder.ibm.com/pseries/en_US/infocenter/base. Select AIX documentation. TheAIX Documentation CD contains the base set of publications for the operating system, includingsystem-management and end-user documentation.Running the Online Diagnostics in Maintenance ModeTo run the online diagnostics in maintenance mode, do the following:1. Stop all programs running on the partition except the AIX operating system (if help is needed, see thesystem 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.5. When DIAGNOSTIC OPERATING INSTRUCTIONS screen displays, follow the displayed instructionsto 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 user or CE Login.Chapter 6. Using the Online and Standalone Diagnostics 85
