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Warning: 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 arising 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.
D.1 Overview
The Unified Extensible Firmware Interface (UEFI) 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 that will allow the UEFI
OS loader stored in an external storage device to boot the system. The UEFI offers clean,
hands-off management to a computer during system boot.
D.2 Recovering 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 corrupted. 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 1: Follow the BIOS recovery instructions in Section D.3 for BIOS recovery when
the main BIOS block crashes.
Note 2: If the recovery instructions in Section D.3 for BIOS recovery fail, you may use
the Supermicro Update Manager (SUM) Out-of-Band (OOB)
com.tw/products/nfo/SMS_SUM.cfm) to reflash the BIOS.
Note 3: If the recovery block processes stated in Note 1 and Note 2 above fail, you will
need to follow the procedures to make a Returned Merchandise Authorization (RMA)
request. Refer to Section 3.5 for more information about the RMA request.
Appendix D
UEFI BIOS Recovery
115
Appendix D: UEFI BIOS Recovery
(https://www.supermicro.
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