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Chapter 18. SSA Problem Determination Procedures
SSA problem determination procedures are provided by power-on self-tests (POSTs),
service request numbers, and maintenance analysis procedures (MAPs). Some of these
procedures use the service aids that are described in Chapter 17, “SSA Service Aids”
on page 373.
Service Request Numbers (SRNs)
Service request numbers (SRNs) are generated by the system error-log analysis,
system configuration code, diagnostics, and customer problem-determination
procedures. SRNs help you to identify the cause of a problem, the failing
field-replaceable units (FRUs), and the service actions that might be needed to solve
the problem.
The SRN Table
The table in this section lists the SRNs and describes the actions you should do. The
table columns are:
SRN The service request number.
Problem A description of the problem and the action you must take.
Possible Causes The condition or FRUs that might be causing the problem, and how likely it is
(by percentage) that a particular FRU is causing the problem.
Abbreviations used in the table are:
DMA Direct memory access.
FRU Field-replaceable unit.
IOCC Input/output channel controller.
PAA P = Adapter port number
AA = SSA address (see also “Finding the Device When No Service Aids Are
Available” on page 409).
POS Programmable option select (POS registers).
POST Power-On Self-Test.
SDRAM Synchronous dynamic random-access memory.
Using the SRN Table
Note: You should have been sent here from either diagnostics or a START MAP. Do
not start problem determination from the SRN table; always go to the START
MAP for the enclosure in which the device is installed.
1. Locate the SRN in the table. If you cannot find the SRN, refer to the
documentation for the subsystem or device. If you still cannot find the SRN, you
have a problem with the diagnostics, the microcode, or the documentation. Call your
support center for assistance.
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