Table 33. Prefixes of location code labels for I/O enclosure and system units (continued)
Prefix Description Example
T Port System unit or enclosure integrated connector
U Unit Usually consists of the machine type
V Virtual planar
W Worldwide unique ID This group of digits follows the resource code
labels and always begins with the letter W
X Electronic industries alliance (EIA) spacing value
for an empty rack location
Standardized unit of measure used to identify the
height of a rack drawer or the usable height
space within a rack.
Y Firmware field replaceable unit (FRU) microprogram or instruction set stored in read
only memory (ROM) of your system
Worldwide unique identifier
The location code label for the worldwide unique identifier consists of the prefix W followed by a
maximum of 16 uppercase hexadecimal digits with no leading zeros. A location code might not consist of
a worldwide unique identifier. When present, the worldwide unique identifier location label follows the
location label of the resource that interfaces with the resource that has the worldwide unique identifier,
usually a port.
5786, 5787, 7031-D24, and 7031-T24 locations
Use the table and illustrations to help you identify the major field replaceable units (FRUs) installed in
your I/O enclosure. The table also will cross reference to the symbolic FRU that might be associated with
each FRU.
Note:
v The known logical location codes for this unit are listed next to the corresponding physical location in
the following information. If you are working with a logical location code for this unit and it is not
listed in the following information, contact your next level of support.
v If you need SCSI repeater card address information, refer to “5786, 5787, 7031-D24, and 7031-T24
addresses” on page 180.
The following illustrations show the FRU layout and its associated location code.
Finding parts, locations, and addresses 133
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