Location Codes; Physical Location Codes; Location Code Format - IBM 265 Service Manual

Location Codes

This system unit uses physical location codes in conjunction with AIX location codes to
provide mapping of the failing field replaceable units. The location codes are produced
by the system unit's firmware and AIX.

Physical Location Codes

Physical location codes provide a mapping of logical functions in a platform (or
expansion sites for logical functions, such as connectors or ports) to their specific
locations within the physical structure of the platform.

Location Code Format

The location code is an alphanumeric string of variable length, consisting of a series of
location identifiers, separated by a dash (-), or slash (/), or a pound sign (#) character.
The series is hierarchical; that is, each location identifier in the string is a physical or
logical child of the one preceding it.
v The - (dash) separator character represents a normal structural relationship where
the child is a separate physical package and it plugs into (or is connected to) the
parent. For example, P1-C1 is a processor card (C1) plugged into a planar (P1), or
P1-M1 is a memory card (M1) plugged into a planar (P1).
v The / (slash) separator character separates the base location code of a function from
any extended location information. A group of logical devices can have the same
base location code because they are all on the same physical package, but may
require extended location information to describe the connectors they support. For
example, P2/S1 describes the location of the serial port 1 controller and its connector
(S1), which is located on planar P2 (its base location code), but the / indicates that
further devices can be connected to it at the external S1 serial connector. The
keyboard controller and its connector likewise have location code P2/K1, which
means they have the same base location code (P2) as serial port 1, but a different
external connector. In contrast, the location code P2-K1 actually points to the device
connected to connector K1; that is, the keyboard. The location code P2/Z1 indicates
an integrated SCSI controller which drives connector Z1, while location codes of
P2-Z1-... point to the actual SCSI bus and devices.
v The # (pound sign) separator character indicates a cable connection between a
connector and parent.
The following are examples:
v P1-C1 identifies processor card C1 plugged into planar P1.
v P1-M1 identifies memory card M1 plugged into planar P1.
v P2/S1 identifies serial port 1 controller on I/O board P2 or the connector for serial
port 1.
v P1-K1 identifies a keyboard attached to connector K1 on planar P1.
v P2/Z1 identifies an integrated SCSI port controller on planar P2 which drives
connector Z1.
v P2-Z1-... points to the actual SCSI bus and devices attached to Z1.
Chapter 1. Reference Information
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