Silicon Graphics 2400, Owner'S Manual

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Chapter 1: Introducing the SGI 2400 and 2800 Server Systems
Figure 1-3 SGI 2400 Multirack Configuration (Four Racks Shown)
Hardware Overview
As shown in Figure 1-4, a single rackmount system can consist of up to two fully
integrated and independent subsystems—Module A and Module B. Each of the modules
in Figure 1-4 has a dedicated System Controller, which monitors module status. Each
module can also have a separate set of hard disks, CPUs, I/O connections, and memory,
as well as a separate operating system, and a separate set of applications.