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v When you are installing a memory riser card:
– Memory DIMMs must be moved from the one-way processor card to the memory
riser card.
– The memory riser card must then have a minimum of 1 quad (four DIMMs).
Riser Card Memory Placement Rules
The rules for memory riser cards are as follows:
v Memory quads must contain DIMMs of equal memory size.
v Quad memory size may be mixed on a riser card.
v The minimum memory is four DIMMs, which must occupy quad A, slots 1, 2, 15 and
16 (see "Memory Riser Card and Memory DIMM Locations" on page 23).
v Populate the riser card starting with quad A and continuing with quads B, C, and D
(see "Memory Riser Card and Memory DIMM Locations" on page 23).
Logical and Physical Locations
This system uses physical location codes in conjunction with AIX location codes to
provide mapping of the failing field replaceable units (FRUs). The location codes are
produced by the system unit's firmware and the AIX operating system.
Physical Location Codes
Physical location codes provide a mapping of logical functions in a platform (or
expansion sites for logical functions, such as connectors or ports) to their specific
locations within the physical structure of the platform.
Location Code Format
The format for the location code is a string of alphanumeric characters separated by a
dash (–), slash (/), pound sign (#) or period (·) character. The base location is all of the
information preceding the slash (/) or pound sign (#). The base location identifies a
device that is connected to or plugged into the parent. Extended location information
follows the slash (/). Extended location information identifies a device that is part of the
parent, a connector, or a cable. Cable information follows the pound sign (#). Cable
information identifies a cable that is connector to parent. The following are examples:
v P1-C1 identifies a processor card C1 plugged into planar P1.
v P1-M1 identifies a memory riser card M1 plugged into planar P1.
v P-1-Z1-A3 identifies a SCSI device with SCSI ID 3 attached to SCSI bus 1 on planar
1.
v P1-K1 identifies a keyboard attached to K1 on planar P1.
v P1/S1 identifies serial port 1 controller on planar P1, the connector for serial port 1,
or the cable attached to serial port 1.
v P1-I2/E3 identifies an Ethernet controller 3, on the card in slot 2 (I2) on planar P1,
the connector for Ethernet controller 3, or the cable attached to Ethernet controller 3.
v P1-I2#E3 identifies the cable attached to Ethernet controller 3 on the card in slot 2
(I2) on planar P1.
Chapter 1. Reference Information
17
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