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Setting System-Board Configuration Jumpers
Table 15 (Page 2 of 2). Configuration Jumper Settings
Jumper Pins Description
J6A4, BIOS Write 1-2
2-3
1
Disables BIOS update of flash
memory.
Enables BIOS update of flash
memory.
Notes:
1. This is the factory default setting.
2. Do not change the settings for the other system-board jumpers.
These jumper settings should remain as set at the factory, unless
changed by an IBM service technician.
Enabling BIOS Recovery Mode (J6A1)
The flash memory contains a protected area that cannot be
corrupted. The code in this area enables the server to start from a
diskette when the BIOS becomes corrupted, for example, if a power
failure occurs during a flash update. After starting, the Flash
Memory Update Utility automatically recovers the system BIOS
from the BIOS recovery files on the diskette.
Notes:
The BIOS recovery jumper, J6A1, must be set to pins 2
and 3 to enable the BIOS flash memory recovery mode.
If you have mapped the BIOS of an adapter to any part
of the E0000H address range, you must either map it to
another area before completing a recovery procedure, or
physically remove the adapter from the system.
Before you run the recovery procedure, verify that the
BIOS write jumper, J6A4, is set to its default position at
pins 2 and 3.
Appendix A. Server Records 293