Logical And Physical Locations; Physical Location Codes; Location Code Format - IBM eserver p Series Service Manual

Logical and Physical Locations

The pSeries 650 system uses physical location codes in conjunction with AIX location codes to provide
mapping of the failing field replaceable units (FRUs). The location codes are produced by the system's
firmware and the AIX operating system.
When the operating system is Linux, there are no Linux location codes, but physical location codes may
appear in the Linux error logs.

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 format for the location code is a string of alphanumeric characters separated by a dash (-), slash (/),
pound sign (#) or period (.) character. The base location is all of the information preceding the slash (/) or
pound sign (#). The base location identifies a device that is connected to or plugged into the parent.
Extended location information follows the slash (/). Extended location information identifies a device that is
part of the parent, a connector, or a cable. Cable information follows the pound sign (#). Cable information
identifies a cable that is connected to parent. The following are examples:
v P1-C1 identifies a processor card C1 (MCM) plugged into planar (backplane) P1.
v P1-M1 identifies a memory card (book) M1 plugged into planar (backplane) P1.
v P1-H2/S1 identifies serial port 1 controller on planar (backplane) P1, the connector for serial port 1, the
cable attached to serial port 1 would be represented by a # sign after the S1.
v P1-I2/E3 identifies a Ethernet controller 3 on the card in slot 2 (I2) on planar (backplane) P1, the
connector for Ethernet controller 3, or the cable attached to Ethernet controller 3.
v P1-I2#E3 identifies the cable attached to Ethernet controller 3 on the card in slot 2 (I2) on planar
(backplane) P1.
The period (.) identifies sublocations (SCSI addresses, cables). The following are examples:
v P1-C1.1 identifies processor 1 on processor card (MCM) plugged into planar (backplane) P1.
v P2-Z1-A3.1 identifies a SCSI device with SCSI address of LUN 1 at SCSI ID 3 attached to SCSI bus 1
from planar (backplane) 2.
v P1-I2#E3.2 identifies the second in a series of cables attached to Ethernet controller 3 on the card in
slot 2 (I2) on planar (backplane) P1.
Depending on the AIX and firmware levels, AIX diagnostics may include the extended location information
when identifying a planar (backplane) or card. The extended location information or cable information is
always included when identifying a cable or connector. Location codes with extended location information
that are displayed without a description identifying the devices always identify the cable attached to the
port.
28 EserverpSeries 650 Service Guide