IBM 3745 Series, Hardware Maintenance Reference

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Reference Code Structure
3745 reference codes are generated by the microcode which runs in the MOSS to
provide an automatic analysis of box event records (BERs). The reference code
has eight significant digits (D1 to D8).
According to the combinations of the values of:
Ÿ D1
Ÿ D2-D3
the other fields may provide different kinds of information. (See Figure 11-14 on
page 11-23 after the 2 examples below).
Reference code related to a hardware problem:
┌──────┬──────┬─────────────┬───────────────────────────┐
│ D1 │ D2 │ D3
D4 │ D5 D6 D7 D8 │
└──────┴──────┴─────────────┴───────────────────────────┘
B 4 ð 8 h h h h
──┬─── ──┬─── ──────┬────── ───────────────────────────
│ │ │ FRU group identifier
│ │ 6 ─────────┬──────────
│ │ BER ID │
│ │ (X'ðð to X'FF) │
│ 6 │
│ BER type │
│ (X'1' to X'F') │
6 6
Identifier Pointer to Refcode file
Always = B, except for
diagnostics (= R)
Figure 11-11. Example of a Power BER Type 4 ID 08
Chapter 11. Error Logging
11-21