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Appendix B. UEFI (POST) error codes
This section details the UEFI (POST) error codes.
UEFI (POST) diagnostic error codes can be generated when the server starts up or while the server is
running. UEFI (POST) codes are logged in the IMM2 event log in the server.
For each event code, the following fields are displayed:
Event identifier
An identifier that uniquely identifies an event.
Event description
The logged message string that appears for an event.
Explanation
Additional information to explain why the event occurred.
Severity
An indication of the level of concern for the condition. The severity is abbreviated in the event log to the
first character. The following severities can be displayed:
Table 36. Event severity levels
Severity
Informational
Warning
Error
User response
Indicate the actions that you should take to resolve the event.
Perform the steps listed in this section in the order shown until the problem is solved. After you perform
all of the actions that are described in this field, if you cannot solve the problem, contact IBM support.
The following is the list of the UEFI (POST) error codes and suggested actions to correct the detected
problems.
List of UEFI events
This section lists all messages that can be sent from UEFI.
• I.11002 [I.11002] A processor mismatch has been detected between one or more processors in
the system.
Explanation: One or More Mismatched Processors Detected
Severity
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Description
An informational message is something that was recorded for audit purposes,
usually a user action or a change of states that is normal behavior.
A warning is not as severe as an error, but if possible, the condition should be
corrected before it becomes an error. It might also be a condition that requires
additional monitoring or maintenance.
An error typically indicates a failure or critical condition that impairs service or
an expected function.
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