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Table 4. 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.
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IBM System x3550 M3 Types 4254 and 7944: Installation and User’s Guide
Summary of Contents for System x3550 M3
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