IBM RS/6000 7025 manual Physical Location Codes, Format

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 format		for the	location	code	is	an	alphanumeric string		of variable	length,
consisting		of a series of location identifiers, separated by the standard dash (-) or
slash	(/)	character. The series is				hierarchical;		that is,	each location	identifier in
string	is	a physical	child	of the	one		preceding	it.

ŸThe - (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 CPU card

(C1)

plugged

into

a

planar

(P1),

or

P1-M1

is

a

memory

card

(M1)

plugged

into

a

planar

(P1).

Ÿ 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

serial connector. The keyboard controller and its connector likewise have

location

code

P2/K1,

which

means they

have the

same

base

location

code

(P1)

as

serial

port

1,

but

a

different

external

connector. In

contrast,

the

location cod

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.

Each location identifier consists of one alpha prefix character that identifies a loca type, and a decimal integer number (typically one or two digits) that identifies a specific instance of this location type. Certain location types may also support secondary sub-locations, which are indicated by appending a period (".") character and a sub-location instance number.

6-14IBM RS/6000 7025 F50 Series User's Guide