IBM System x3650 M3 4255 Service Guide

Table 2. System board jumpers (continued)
Jumper
number
Jumper
name Jumper setting
J147 IMM
recovery
jumper
v Pins 1 and 2: Normal (default) Loads the primary IMM
firmware ROM page.
v Pins 2 and 3: Loads the secondary (backup) IMM firmware
ROM page.
Notes:
1. If no jumper is present, the server responds as if the pins are set to 1 and 2.
2. Changing the position of the UEFI boot recovery jumper from pins 1 and 2 to pins 2 and
3 before the server is turned on alters which flash ROM page is loaded. Do not change
the jumper pin position after the server is turned on. This can cause an unpredictable
problem.
The following illustration shows the jumper settings for switch blocks SW3 and SW4
on the system board.
SW3 switch blockSW4 switch block
1234 1234
Off Off
Table 3 on page 19 and Table 4 on page 19 describe the function of each switch on
SW3 and SW4 switch blocks on the system board.
18 IBM System x3650 M3 Types 4255, 7945, and 7949: Problem Determination and Service Guide

IBM System x3650 M3 4255 Specifications

General

Form Factor	2U Rack
Chipset	Intel 5520
Max Processors	2
Processor	Intel Xeon 5600 series
Memory	Up to 192GB DDR3
Network Interface	Dual-port Gigabit Ethernet
Hard Drive Bays	Up to 16 x 2.5" or 6 x 3.5"
RAID Support	RAID 0, 1, 10
Memory Slots	18 DIMM slots
Operating System Support	Microsoft Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, VMware