AIX location codes

Note: AIX logical location codes may still seen and supported under various AIX commands and functions. However, the Diagnostic screens and menus display physical location codes for resources when running versions 5.2.0 and later. For systems with 5.2.0 or later, refer to Physical location codes.

The basic formats of the AIX location codes are as follows:

For non-SCSI devices/drives:
```
AB-CD-EF-GH
```
For SCSI devices/drives:
```
AB-CD-EF-G,H
```

For planars, cards, and non-SCSI devices, the location code is defined as follows:

AB-CD-EF-GH
 |  |  |  |
 |  |  |  Device/FRU/Port ID
 |  |  Connector ID
 |  devfunc Number, Adapter Number or Physical Location
 Bus Type or PCI Parent Bus

The AB value identifies a bus type or PCI parent bus as assigned by the firmware.
The CD value identifies adapter number, adapter's devfunc number, or physical location. The devfunc number is defined as the PCI device number times 8, plus the function number.
The EF value identifies a connector.
The GH value identifies a port, address, device, or FRU.

Adapters and cards are identified only with AB-CD. The possible values for AB are:

00	Processor bus
01	ISA bus
02	EISA bus
03	MCA bus
04	PCI bus used in the case where the PCI bus cannot be identified
05	PCMCIA buses
xy	For PCI adapters where x is equal to or greater than 1. The x and y are characters in the range of 0-9, A-H, J-N, P-Z (O, I, and lower case are omitted) and are equal to the parent bus's IBM aix-loc Open Firmware Property.

The possible values for CD depend on the adapter or card are as follows:

For pluggable PCI adapters/cards, CD is the device's devfunc number (PCI device number times 8, plus the function number). The C and D are characters in the range of 0-9, and A-F (hex numbers). This allows the location code to uniquely identify multiple adapters on individual PCI cards.
For pluggable ISA adapters, CD is equal to the order in which the ISA cards defined or configured, either by SMIT or the ISA Adapter Configuration Service Aid.

For integrated ISA adapters, CD is equal to a unique code identifying the ISA adapter. In most cases, this is equal to the adapter's physical location code. In cases where a physical location code is not available, CD is FF.
EF is the connector ID. It is used to identify a connector on the adapter to which a resource is attached.
GH is used to identify a port, device, or FRU. For example:
- For async devices, GH defines the port on the fanout box. The values are 00 to 15.
- For a diskette drive, H defines either diskette drive 1 or 2. G is always 0.
- For all other devices, GH is equal to 00.

For the integrated adapters, EF-GH is the same as the definition for the pluggable adapters. For example, the location code for a diskette drive is 01-D1-00-00. A second diskette drive is 01-D1-00-01.

For SCSI devices, the location code is defined as:

AB-CD-EF-G,H
 |  |  | | |
 |  |  | | Logical Unit address of the SCSI Device
 |  |  | Control Unit Address of the SCSI Device
 |  |  Connector ID
 |  devfunc Number, Adapter Number or Physical Location
 Bus Type or PCI Parent Bus

Where:

AB-CD-EF are the same as non-SCSI devices.
G defines the control unit address of the device. Values of 0 to 15 are valid.
H defines the logical unit address of the device. Values of 0 to 255 are valid.

There is also a bus location code that is generated as '00-xxxxxxxx' where xxxxxxxx is equivalent to the node's unit address. Refer to the system unit service guide for additional information.

Table 1. Location Code Examples
Descriptions of Example Locations	Location Code
Locations in a single enclosure platform
System planar	P1
CPU card in slot 1 (or pluggable CPU module in module socket 1)	P1-C1
Memory SIMM in slot 2 on the planar	P1-M2
I/O planar (including all integrated I/O devices)	P2
Card in I/O slot 4	P2-I4
Serial port 2 controller (with connector)	P2/S2
Keyboard port controller (with connector)	P2/K1
Keyboard (connected to keyboard port)	P2-K1
Power Supply	V1
Fan 2	F2
Op panel	L1
Integrated SCSI controller (with connector)	P2/Z1
Locations in a multi-enclosure platform
System planar	U1-P1
Memory DIMM 12 on memory card in slot 2 on the system planar	U1-P1-M2.12
Connector/cable from system planar to remote I/O expansion planar	U1-P1-Q1
Adapter in slot 4 of an I/O expansion planar in a second enclosure	U2-P1-I4