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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 the string is a physical 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
CPU 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.
Each location identifier consists of one alpha prefix character that identifies a location 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.
Specifically, the format of a location code is defined as follows:
pn[.n][- or /]pn[.n][- or /]...
Where p is a defined alpha location type prefix, n is a location instance number, and [.n] is a sub-location
instance number (where applicable). Sub-location notation is used only for location types which have
clearly defined and limited expansion sites; for example, memory SIMMs slots on a memory card.
Primarily, the [.n] sub-location notation is intended for use as an abbreviation of the location code in cases
where:
1. Based on the device structure, the abbreviated sub-location code conveys the same information in a
more concise form than an additional level of location identifier -- for example:
v P1-M1.4 (pluggable DIMM 4 on Memory Card 1 on Planar 1), rather than P1-M1-M4
v P1-C1.1 (pluggable CPU 1 on CPU Card 1 on Planar 1), rather than P1-C1-C1
v P2-Z1-A3.1 (LUN 1 at SCSI ID 3 on integrated SCSI bus 1 from Planar 2), rather than P2-Z1-A3-A1
2. The sub-location is either a basic physical extension or sub-enclosure of the base location, but does
not represent additional function or connectivity; for example, a drawer in a rack (U1.2) or a riser card
on an I/O planar (P2.1).
2105 Model Exx/Fxx and Expansion Enclosure Location Code Legend
A
= Address (SCSI ID) <0-15> -or- SSA Connector if for SSA Card
= Host Bay (Bx) where "x" = 1...2 -or- SSA Connector if for SSA Card
B
= Card or CPU Processor (Cx) or Cache Module on a card (Cx.1), where "x" = 1..2
C
2105 Model Exx/Fxx and Expansion Enclosure Locations, CHAPTER 7
Locations
5
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