IBM Power 595, Технический обзор и введение

Страница: 94 / 188

82
IBM Power 595 Technical Overview and Introduction
When multiple DIMM sizes are ordered, smaller DIMM sizes are placed in the fewest
processor books possible, while insuring that the quantity of remaining larger DIMMs are
adequate to populate at least one feature code per MCM module. The largest DIMM size is
spread out among all remaining processor books. This tends to balance the memory
throughout the system.
For memory upgrades, DIMMs are added first to those books with fewer DIMMs until all books
have the same number of DIMMs. Any remaining memory is then distributed round robin
amongst all books having that size DIMM.
The following memory configuration and placement rules apply to the 595 server:
At initial order, each installed processor book must have a minimum of:
– Four memory units installed (50% populated). The memory units must use the same
DIMM size within the processor book. Different DIMM sizes can be used within the 595
server. For 16 GB DIMMs, memory units must be installed in groups of eight.
– 16 GB of memory activated
Memory upgrades can be added in groups of two units (16 GB DIMMs must be added in
groups of eight units), as follows:
– For memory upgrades, you are not required to add memory to all processor books.
– You must maintain the same DIMM sizes within a processor book when adding
memory.
Processors books are 50% (initial), 75%, or 100% populated. Put another way, each
processor book will have either, four, six, or eight memory units installed.
2.8 Internal I/O subsystem
Each processor book on the 595 server provides four GX busses for the attachment of GX
bus adapters. A fully configured 595 server with eight processor books supports up to 32 GX
bus adapters. The GX bus adapter locations are shown in Figure 2-34.
Figure 2-34 GX bus adapters
The processor book provides two narrow and two wide GX bus adapter slots. Narrow
adapters fit into both narrow and wide GX bus slots.
Processor Book
Node Controllers
GX bus adapters (narrow)
GX bus adapters (wide)
Processor Book
Node Controllers
GX bus adapters (narrow)
GX bus adapters (wide)