Diagnostic features

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This topic describes the diagnostic features.

Missing Options Resolution
This section describes the Missing Options Resolution Procedure performed by Diagnostics when a change in the system configuration has been detected. This procedure can be run to clean up the system configuration database, or to determine why previously detected resources are no longer found by the operating system.
Error log analysis
Error log analysis does not test the resource. Instead this method searches the operating system error log for an entry (or entries) related to the resource. If an entry is found, then an analysis is performed on the error that was logged, and a determination is made by the Diagnostic Application as to whether the resource should be called out as being bad.
Periodic diagnostics
Periodic testing of the disk drives and battery are enabled by default on systems that support these tests. The disk diagnostics perform disk error log analysis on all disks. The battery test checks the real-time clock and NV-RAM battery.
Automatic error log analysis (DIAGELA)
Automatic Error Log Analysis (diagela) provides the capability to do error log analysis whenever a permanent hardware error is logged. Whenever a permanent hardware resource error is logged and the diagela program is enabled, the diagela program is invoked. Automatic Error Log Analysis is enabled by default on all platforms.
Loop testing
Loop testing is the testing of a resource or resources multiple times under program control. The looping is controlled by the Diagnostic Controller. Loop testing is only supported when running in maintenance mode or service mode, and Advanced Diagnostic Routines have been chosen.

Parent topic: Understanding the Diagnostic Subsystem for AIX