9-1
CHAPTER
9
XSCF Unit Replacement
The eXtended System Control facility unit (XSCFU or XSCF unit) is also known as
the service processor. The unit operates with an independent processor and directs
startup, reconfiguration, and fault diagnosis and provides access to the domains. This
chapter provides an overview of the unit and describes how to remove and replace it.
This information is organized into the following topic:
■ Section 9.1, “XSCF Unit Replacement” on page 9-1
9.1 XSCF Unit Replacement
The XSCF unit is a cold replacement component. This means the entire server must
be powered off and the power cords disconnected to replace the XSCF unit.
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.
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