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
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