Reference Codes - IBM BladeCenter JS22 Problem Determination And Service Manual

Reference codes

Reference codes are diagnostic aids that help you determine the source of a
hardware or operating system problem. To use reference codes effectively, use them
in conjunction with other service and support procedures.
The BladeCenter JS22 Type 7998 blade server produces several types of codes.
Progress codes: The power-on self-test (POST) generates eight-digit status codes
that are known as checkpoints or progress codes, which are recorded in the
management-module event log. The checkpoints indicate which blade server
resource is initializing.
Error codes: The First Failure Data Capture (FFDC) error checkers capture fault
data, which the baseboard management controller (BMC) service processor then
analyzes. For unrecoverable errors (UEs), for recoverable events that meet or
exceed their service thresholds, and for fatal system errors, an unrecoverable
checkstop service event triggers the service processor to analyze the error, log the
system reference code (SRC), and turn on the system attention LED.
The service processor logs the nine-word, eight-digit per word error code in the
BladeCenter management-module event log. Error codes are either system reference
codes (SRCs) or service request numbers (SRNs). A location code might also be
included.
Isolation procedures: If the fault analysis does not determine a definitive cause,
the service processor might indicate a fault isolation procedure that you can use to
isolate the failing component.
Viewing the codes
The JS22 blade server does not display checkpoints or error codes on the remote
console. The shared BladeCenter unit video also does not display the codes.
If the POST detects a problem, a 9-word, 8-digit error code is logged in the
BladeCenter management-module event log. A location code that identifies a
component might also be included. See "Error logs" on page 186 for information
about viewing the management-module event log.
Service request numbers can be viewed using the AIX diagnostics CD, or various
operating system utilities, such as AIX diagnostics or the Linux service aid
"diagela", if it is installed.
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Chapter 2. Diagnostics