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User Guide
286
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Selecting the BIOS Bank
The motherboard has 4 MB of flash space for system BIOS. This flash is divided into 2
banks of 2MB each, the Upper Bank and the Lower Bank. The BIOS can reside in one
or both of these banks.
The BIOS area from which the system boots is called the “Primary BIOS partition”.
The other BIOS area is called “Backup partition” or “Secondary BIOS partition”.
All BIOS updates are made only to the “Secondary BIOS partition”.
BIOS updates can be initiated with the BIOS Bank Select Jumper configured either as
Recovery Mode or Normal Operation. The system will behave as described below.
Bank Select Jumper in Normal Mode (2-3)
1.
Boot the system with the jumper configured as 2-3.
2.
Update the BIOS using the flashing utility.
3.
Reset the system.
4.
The new BIOS image on the secondary partition is validated.
Bank Select Jumper in Recovery Mode (1-2)
1.
Boot the system with the jumper configured as 1-2.
2.
Update the BIOS using the flashing utility.
3.
Reset the system.
4.
The system boots from the old BIOS.
5.
Power off the system and configure the jumper as 2-3.
6.
Power on the system.
7.
If the new BIOS is healthy, the system boots using the new BIOS. If the BIOS
is corrupted, no roll back occurs. In this case, power off the sytem, configure
the system as 1-2 and power on the server to boot using the old BIOS.
Updating the BIOS
1.
Follow the instructions in the readme file that came with the BIOS update.
When the update completes, remove the bootable media from which you
performed the update.
Caution
Do not power down the system during the BIOS update pro-
cess! The system will reset automatically when the BIOS
update process is completed.
Summary of Contents for NovaScale T840
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Page 11: ...User Guide 11 www bull com Specifications 290 Equipment Log 292 Hardware 293 Software 298 ...
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