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.

Error log analysis is performed via different methods with the Diagnostic Subsystem. One method is that error log analysis is performed automatically whenever a permanent hardware error is logged to the operating system error log. This method is called Automatic Error Log Analysis (DIAGELA).

A second method can be set up to run diagnostics automatically at a pre-set time of the day. This method is referred to as Periodic Diagnostics.

A third method can be run directly from the command line by using the -e flag with the diag command.

A fourth method is invoked automatically whenever diagnostics is ran in Problem Determination Mode after first starting diagnostics. This method is described below.