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UEFI BIOS Recovery Instructions
Attention! Do not upgrade the BIOS unless your system has a
BIOS-related issue. Flashing the wrong BIOS can cause irreparable
damage to the system. In no event shall Supermicro be liable for
direct, indirect, special, incidental, or consequential damages aris-
ing from a BIOS update. If you need to update the BIOS, do not
shut down or reset the system while the BIOS is updating to avoid
possible boot failure.
C-1 An Overview to the UEFI BIOS
The Unified Extensible Firmware Interface (UEFI) specification provides a
software-based interface between the operating system and the platform
firmware in the pre-boot environment. The UEFI specification supports
an architecture-independent mechanism for add-on card initialization to
allow the UEFI OS loader, which is stored in the add-on card, to boot
up the system. UEFI offers a clean, hands-off control to a computer
system at bootup.
C-2 How to Recover the UEFI BIOS Image
A UEFI BIOS flash chip consists of a recovery BIOS block and a main
BIOS block (a main BIOS image). The recovery block contains critical
BIOS codes, including memory detection and recovery codes for the user
to flash a healthy BIOS image if the original main BIOS image is cor-
rupted. When the system power is turned on, the recovery block codes
execute first. Once this process is complete, the main BIOS code will
continue with system initialization and the remaining POST (Power-On
Self-Test) routines.
Note: Follow the BIOS Recovery instructions below for BIOS recov-
ery when the main BIOS boot crashes. However, when the BIOS
boot block crashes, you will need to follow the procedures to make
a Returned Merchandise Authorization (RMA) request.
Appendix C
C-1
Appendix C: UEFI BIOS Recovery
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