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11-1
CHAPTER
11
XSCF Unit Replacement
This chapter explains the replacement procedures for an eXtended System Control Facility
unit (XSCFU). It covers the following:
■ Section 11.1, “Overview of the XSCFU” on page 11-1
■ Section 11.2, “Active Replacement and Hot Replacement” on page 11-5
■ Section 11.3, “Cold Replacement” on page 11-12
There are three methods for replacing an XSCFU: active replacement, hot replacement, and
cold replacement. For the definition of each type of method, see Section 4.1, “Types of
Replacement Procedures” on page 4-2.
Note – If you replace the XSCF unit and the operator panel simultaneously, system will not
operate normally. Execute the showhardconf command or the showstatus command to
confirm that the component replaced earlier is operating normally, before replacing the
subsequent FRU.
11.1 Overview of the XSCFU
This section provides an overview of the XSCFU and describes their mounting locations.
The XSCFU controls and manages the server hardware. There are two types of XSCFU: the
XSCFU_B, which is used for both high-end servers, and the XSCFU_C, which is used for
the expansion cabinet of the M9000. The XSCFU is duplicated, and active maintenance can
be performed on it.
FIGURE 11-1, FIGURE 11-2, and FIGURE 11-3 show the mounting locations of XSCFUs in the
cabinets of the M8000 server, the M9000 server (base cabinet), and the M9000 server (with
the expansion cabinet), respectively.