Log entries

Logging is a function of Licensed Internal Code and starts during Licensed Internal Code initialization.

Logging is a function of Licensed Internal Code and starts during Licensed Internal Code initialization. Licensed Internal Code parts (see Licensed Internal Code) send log records to the product activity log. Licensed Internal Code input/output managers do much of the error machine check controlling.

The IOPs also have the ability to send data into the product activity log. Log records from the IOPs are processed by the Reliability Availability Serviceability (RAS) Focal Point Common Class I/O Manager Task in Licensed Internal Code. The following are the types of log entries from the IOP:

Asynchronous Log Report

This is a bus-level record that is used when the I/O processor has detected a critical failure. The asynchronous log report is used when the IOP cannot communicate with Licensed Internal Code or the service processor.

Log Notification Record

This is a log record that is reported to the system from the IOP after the RAS connections have been set up.

Log Information Record

This is an information-only record that is reported to the system after the RAS connections have been set up. The information records (statistics) are logged as product activity log information.

The following list describes the attributes of the product activity log:

Permanent errors that do not stop the system
Machine check data when available on the next IPL (if power was not switched off before doing the next IPL)
Any temporary errors necessary for problem analysis
Data in multiple formats
RAS error information and bus level asynchronous log report
Device driver reported records
Some dumps and trace data
Volume information (statistics) data records

A formatted printout of the product activity log records is available by using the Product activity log option from the Start a Service Tool display under Dedicated Service Tools (DST).