Service Request Numbers (SRNs)
Service request numbers (SRNs) are generated for the SSA Hot-Swap Disk Drive 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 A-1 on page A-6 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 A-5).
% 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
Procedures (MAPs).” Do not start problem determination from the SRN table; always
go to “SSA Maintenance Analysis Procedures (MAPs)” on page 2-35 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.
2. Read carefully the “Action” you must perform for the problem.
Do not exchange
FRUs unless you are instructed to do so
.
Appendix A. SSA Problem Determination Procedures A-3
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