AIX Location Codes
The basic formats of the AIX location codes are as follows:
v For non-SCSI devices/drives:
– AB-CD-EF-GH
v 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
v The AB value identifies a bus type or PCI parent bus as assigned by the firmware.
v 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.
v The EF value identifies a connector.
v The GH value identifies a port, address, device, or FRU.
Adapters and cards are identified only with AB-CD.
The possible values for CD depend on the adapter/card. 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). The location codes therefore uniquely identify multiple adapters on individual
PCI cards.
EF is the connector ID, used to identify the adapter’s connector to which a resource is
attached.
GH is used to identify a port, device, or FRU. For example:
v For async devices, GH defines the port on the fanout box. The values are 00 to 15.
v For a diskette drive, H identifies either diskette drive 1 or 2. G is always 0.
v For all other devices, GH is equal to 00.
For integrated adapter, EF-GH is the same as the definition for a pluggable adapter. For
example, the location code for a diskette drive is 01-D1-00-00. A second diskette drive
is 01-D1-00-01.
34 Service Guide
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