Lenovo ThinkServer RD220 3797 Series Installation And User Manual page 42

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ThinkServer RD220 Types 3729, 3779, 3797, and 3798: Installation and User Guide
Table 4. Callout descriptions
Jumper name
1
UEFI boot recovery
jumper (J29)
2
IMM recovery
jumper (J147)
3
SW4 switch block
(reserved)
4
SW3 switch block
Jumper setting
v Pins 1 and 2: Normal (default) Loads the primary server
firmware (formerly called BIOS) ROM page.
v Pins 2 and 3: Loads the secondary (backup) server firmware
ROM page.
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.