Aix 5L Ras Features; Section 6.7, "Aix 5L Ras Features - IBM p5 590 System Handbook

Automating various service procedural tasks, instead of relying on the service
representative can help remove or significantly reduce the likelihood of service
representative induced errors.
Many service tasks can be automated. For example, the HMC can guide the
service representative to:
Interpret error information.
Prepare components for removal or initiate them after install.
Set and reset system identify LEDs as part of the Guiding Light service
approach.
Automatically link to the next step in the service procedure based on input
received from the current step.
Update the service history log, indicating the service actions taken as part of
the repair procedure. The history log helps to retain an accurate view of the
service scenarios in case future actions are needed.

6.7 AIX 5L RAS features

The RAS features described in the previous sections are all based on the p5-590
and p5-595 hardware. There are some additional RAS features that work in
conjunction with the AIX 5L operating system, and some that are entirely
dependent on AIX 5L. The following outlines some of the AIX 5L RAS features.
Unrecoverable error analysis
AIX 5L analyzes the hardware reported unrecoverable errors. If the process is
a user process, it will be terminated. If the process is within the AIX 5L kernel,
then the operating system will be terminated. Again, terminating AIX 5L in a
partition will not impact any of the other partitions.
Error log RAS
Under very rare circumstances, such as powering off the system exactly while
the errdaemon is writing into the error log, the error log may become
corrupted. In AIX 5L Version 5.3 there are minor modifications made to the
errdaemon to improve its robustness. The difference from the previous
versions of AIX and AIX 5L is that the errdaemon used to reset the log file if it
was corrupted, instead of repairing it.
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