Major Components
27
Premium Directory Memory
The optional premium directory DIMMs are required only for configurations with more
than 16 Node boards. These directory memory DIMMs maintain cache coherence in large
system configurations. Cache coherence helps provide data consistency when multiple
processors need to access the same piece of memory.
Hub
The Hub ASIC on the Node board is the primary communication link between the 64-bit
processor, the I/O subsystem, the main memory, and the CrayLink Interconnect. The
Hub also interfaces with directory memory, which is responsible for maintaining cache
coherence.
Status LEDs
Figure 2-8 shows the bulkhead on the front of the Node board. The LEDs provide status
information for the individual boards.
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Страница 1: ...SGI 2400 and 2800 Server Owner s Guide Document Number 007 4192 001 ...
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Страница 22: ...2 Chapter 1 Introducing the SGI 2400 and 2800 Server Systems Figure 1 1 SGI 2400 Rackmount Server System ...
Страница 23: ...System Features 3 Figure 1 2 SGI 2400 Multirack System Configuration Example ...
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Страница 48: ...28 Chapter 2 Chassis Tour Figure 2 7 Node Board Positioning in the Chassis Node 1 Node 4 Node 3 Node 2 ...
Страница 71: ...Rackmount Configurations 51 Figure 4 4 16P SGI 2400 Server Node boards Router boards Midplane R1 R2 R3 R4 ...
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Страница 81: ...Connecting Your Terminal 61 Figure 5 1 Connecting a Terminal Terminal Console port ...
Страница 87: ...Loading the CD ROM 67 Figure 5 4 Installing a CD ROM Into an SGI 2400 or 2800 Chassis Retainers Retainers ...
Страница 91: ...Initially Powering On the System 71 Figure 5 7 Turning On the PDU PDU off PDU on PDU power switch ...
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Страница 107: ...General Procedures 87 Figure 6 5 Turning Off the PDU PDU off PDU on PDU power switch ...
Страница 113: ...Specific Procedures 93 Figure 6 10 Removing the Drive Handle in open position Handle in closed position ...
Страница 117: ...Specific Procedures 97 Figure 6 12 Removing the System Controller and CD ROM ...
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