IBM HANDBOOK 260 - Manual (Page 166)

148 RS/6000 43P 7043 Models 150 and 260 Handbook
04 for resources attached to PCI buses, such as ISA bus, SCSI
controller, CD-ROM drive, hard disks, and graphics adapter.
• For SSA, these values are always zero.
CD identifies a slot or adapter number.
• The possible values for CD depend on the adapter or card. For pluggable
adapters or cards, this will be a two-digit slot number in the range from 01
to 99.
• For integrated adapters, the first character in CD will be a letter in the
range from A to Z. The letter is based on the order that the integrated
adapters are defined in residual data and ensures unique location codes
for the integrated adapters. The second character, D, will be set to 0.
Any adapter or card is defined only with AB-CD. SSA adapters will show
the system I/O bus identifier here.
EF is the connector identifier.
• On adapters with multiple connectors, it is used to identify the adapter
connector that a resource is attached to. For SSA, this will show the
physical disk drive module and the logical disk drive.
GH for non-SCSI devices is a port identifier, address, DIMM, devices or a
Field Replaceable Unit (FRU). It has several meanings, depending upon the
resource type.
G,H for SCSI devices defines the following:
• G defines the control-unit address of the device
• H defines the logical-unit address of the device
Figure 35 shows an example of PCI-based RS/6000 systems' location codes.