System Configurations; Compute - Silicon Graphics Origin 300 User Manual

4.

Compute

007-4498-002
Chapter 4
System Configurations
This chapter describes the following system configurations:
• "Compute" on page 93
• "System Control" on page 96
• "I/O" on page 98
• "Storage" on page 100
• "Power" on page 102
In a tall rack, the SGI Origin 300 system with NUMAlink module consists of two to eight
Origin 300 base modules. A short rack can consist of two to six base modules. When only
two base modules are present in the system, they reside in the locations that are directly
below the NUMAlink module. For example, when the NUMAlink module resides in
location U20 (tall rack), the two base modules reside in locations U18 and U16. When the
NUMAlink module resides in location U8 (short rack), the two base modules reside in
locations U6 and U4.
Note: The global master is the Origin 300 base module that resides in the lowest location
in the rack.
Additional base modules are added to the rack by alternating between the top and
bottom portions of the rack. For example, the additional base modules can be added to
the rack in the following order:
• The third base module is placed in location U22 (tall rack) or U10 (short rack).
• The fourth base module is placed in U24 (tall rack) or U12 (short rack).
• The fifth base module is placed in U14 (tall and short racks).
• The sixth base module is placed in U12 (tall rack) or U16 (short rack).
• The seventh base module is placed in U26 (tall rack).
• The eighth base module is placed in U28 (tall rack).
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