IBM 7979B1U User Manual - Page 37

System-board, switches, jumpers

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System-board switches and jumpers The following illustration shows the switches and jumpers on the system board. Any switches or jumpers on the system board that are not shown in the illustration are reserved. See the section about recovering the basic input/output system (BIOS) code in the Problem Determination and Service Guide on the IBM System x Documentation CD for information about using the boot block recovery jumper. SAS controller jumper Reserved (J89) Boot block recovery jumper (J42) Pin 1 Switch block (SW2) Table 2 on page 22 describes the function of each switch on the switch block. Chapter 2. Installing optional devices 21

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System-board
switches
and
jumpers
The
following
illustration
shows
the
switches
and
jumpers
on
the
system
board.
Any
switches
or
jumpers
on
the
system
board
that
are
not
shown
in
the
illustration
are
reserved.
See
the
section
about
recovering
the
basic
input/output
system
(BIOS)
code
in
the
Problem
Determination
and
Service
Guide
on
the
IBM
System
x
Documentation
CD
for
information
about
using
the
boot
block
recovery
jumper.
Boot block
recovery jumper
(J42)
Switch block
(SW2)
SAS controller jumper
Reserved (J89)
Pin 1
Table
2
on
page
22
describes
the
function
of
each
switch
on
the
switch
block.
Chapter
2.
Installing
optional
devices
21