Model D20 Location Codes; Aix And Physical Location Code Table - IBM pSeries 7311 D10 Service Manual

Model D20 Location Codes

This system (processor subsystem and attached I/O subsystems) uses physical location codes in
conjunction with AIX location codes to provide mapping of a failing field replaceable units (FRUs). The
location codes are produced by the processor subsystem's firmware and AIX. For information about how to
read a location code, see the service guide for the processor subsystem to which your I/O subsystem is
connected.

AIX and Physical Location Code Table

This section covers the AIX and Physical Location Code tables for the Model D20 I/O subsystem.
The tables in this section contain the location codes for I/O subsystems when they are attached to the
system unit. In the tables, the location code for the I/O subsystem number is represented by dd. The first
time that an installed system is powered on, the I/O subsystems are numbered. For example, if a system
is first powered on with two I/O subsystems connected, then the dd value for the connected I/O
subsystems should be numbered from 2 and 3.
Note: If the system was powered on with I/O subsystems connected before delivery to the customer, the
I/O subsystem location codes for the drawers connected at that time are already assigned.
If at a later time, an I/O subsystem is removed from the system and a different I/O subsystem is
substituted, the substitute is assigned the next higher number available for its value of dd, which, in the
earlier example, is 4. If the original I/O subsystem is reinstalled in the system configuration, the system
uses the original dd value for the I/O subsystem.
To keep the system from renumbering the I/O drawer when an I/O backplane is replaced, the VPD module
from the old I/O backplane must be moved over to the new I/O backplane.
The following diagram defines each part of a location code.
Ux.dd-xx-yy
| | | |
| | | |
| | | yy This code is used for the next component (yy, yy, yy, ...)
| | xx This code is used for the next component (Px, Fx, Vx, ...)
| dd This code is the location code for the I/O drawer (2 to 63)
Ux This code normally identifies the rack in which a drawer is installed.
The x will always be zero (0) for this system.
Chapter 1. Reference Information
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