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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 you 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.
Note1: Follow the BIOS recovery instructions in
the main BIOS block crashes.
Note 2: If the recovery block processes stated in
the procedures to make a Returned Merchandise Authorization (RMA) request. Refer
to
Section 3.5
D.3 Recovering the Main BIOS Block with a USB Device
This feature allows you to recover the main BIOS image using a USB-attached device without
additional utilities used. A USB flash device such as a USB Flash Drive, or a USB CD/DVD
ROM/RW device can be used for this purpose. However, a USB hard disk drive cannot be
used for BIOS recovery at this time. The file system supported by the recovery block is FAT
(including FAT12, FAT16, and FAT32) which is installed on a bootable or non-bootable USB-
attached device.
Appendix D
UEFI BIOS Recovery
for more information about the RMA request.
127
Appendix D: UEFI BIOS Recovery
Section D.3
for BIOS recovery when
Section D.3
fail, you will need to follow
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