System-Board Switches And Jumpers - IBM 7979B1U User Manual

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)
Table 2 on page 22 describes the function of each switch on the switch block.
Pin 1
SAS controller jumper
Reserved (J89)
Chapter 2. Installing optional devices
21