Chapter 5. SSA Software and Microcode Errors
Service Request Numbers (SRNs)
Service request numbers (SRNs) are generated for the SP 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
Table 5-1 on page 5-3 lists the SRNs and describes the actions you should perform.
The table columns are:
SRN The service reference number
FRU list The FRU or FRUs that might be causing the problem (see also “FRU
Names Used in the SRN Table” on page 5-2)
% How likely it is (by percentage) that the FRU is causing the problem
Problem A description of the problem and the action you must take
Abbreviations used in the table are:
DMA Direct memory access
FRU Field-replaceable unit
IOCC Input/output channel controller
POS Programmable option select (POS registers)
POST Power-on self-test
PAA P = adapter port number
AA = SSA address
Using the SRN Table
Important: You should have been sent here from “SSA Maintenance Analysis Pro-
cedures (MAPs).” Do not start problem determination from the SRN table; always go
to “SSA Maintenance Analysis Procedures (MAPs)” on page 2-43 first.
1. Locate the SRN in the table. If you cannot find the SRN, you have a problem
with the diagnostics, the microcode, or the documentation. Call your support
center for assistance.
Chapter 5. SSA Software and Microcode Errors 5-1
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