Machine type and model number in a location code Feature codes and sequence numbers in a location code
Utttt.mmm.sssssss-A1 Uffff.ccc.sssssss-A1
sssssss represents the serial number for the enclosure. sssssss represents the serial number of the enclosure.
Note: The mmm or ccc number might not be displayed on all location codes for all servers. If the mmm value is not
displayed, the location code is displayed in one of the following forms:
v Utttt.sssssss-A1
v Uffff.sssssss-A1
The location code is hierarchical; that is, each location identifier in the string represents a physical part.
The order (from left to right), in which each identifier is shown, allows you to determine which parts
contain other parts in the string.
The dash (-) separator character represents a relationship between two components in the unit. In the
example of the fan, whose location code is Un-A1, the dash shows that the fan (A1) is contained in the
base unit (or Un). Modules, adapters, cables, and devices are all parts that are plugged into another part.
Their location codes will always show that they are plugged into another part as components of the
server. Another example follows:, Un-P1-C9 is a memory DIMM, with memory DIMM (C9) plugged into
a backplane (P1), which is inside the unit (Un).
To review a list of location codes for your I/O enclosure, refer to “5786, 5787, 7031-D24, and 7031-T24” on
page 130.
Note: For devices, certain error conditions might cause an IBM i device to display the device location in
an AIX format.
Table 32. Unit type and locations
Unit type (Utttt.mmm) Link to location information
U5786.001 Locations
U5787.001 Locations
U7031.D24 Locations
U7031.T24 Locations
Location code labels
The location code label represents a physical part of the server. The following table describes the prefixes
of location code labels.
Table 33. Prefixes of location code labels for I/O enclosure and system units
Prefix Description Example
A Air-moving device Fan, blower
C Card connector input/output port (IOP), input/output adapter
(IOA), dual inline memory module (DIMM),
processor card
D Device Diskette, control panel
E Electrical Battery, power supply, ac charger
L Logical path SCSI target Integrated drive electronics (IDE) address, Fibre
Channel logical unit number (LUN)
N Horizontal placement for an empty rack location
P Planar System backplane
132 Finding parts, locations, and addresses
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