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Chapter 2: Chassis Tour
System Controller
There are two types of System Controllers used in the servers—a single module System
Controller (MSC) and a multimodule System Controller (MMSC) and display. The MSC
does not have the same functional abilities as the MMSC. For detailed information on
operating the System Controller, see Chapter 7, “Using the System Controller.”
MSC and Display
The MSC and display (Figure 2-4) provide environmental and status monitoring for an
individual system module.
MMSC and Display
The MMSC and display (see Figure 2-5) are the single-point administration interface for
the rackmount configuration. The individual module controllers are tied to the
multimodule controller through an eight-pin serial connection from the module to the
multimodule controller board in the rack.
The MMSC and display are two separate units as shown in Figure 2-1 and Figure 2-2.
There should only be one multimodule display per configuration to act as the
single-point administration for the rack configuration. In addition, in a multirack
configuration, the rack with the MMSC and display should always be placed in the
leftmost position (see Figure 1-2 and Figure 1-3 in Chapter 1).
Caution: The front panel display provides a convenient method to power on, shutdown,
reset, and to issue a nonmaskable interrupt (NMI) to the entire rack configuration. Use
extreme care when issuing these commands from the display. Make sure that all affected
users are notified before a system-wide command is executed.