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UEFI BIOS Recovery Instructions
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.
B-1 An Overview to the UEFI BIOS
The Unifi ed Extensible Firmware Interface (UEFI) specifi cation provides a software-
based interface between the operating system and the platform fi rmware in the
pre-boot environment. The UEFI specifi cation 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, hand-off control to
a computer system at bootup.
B-2 Recovering the UEFI Main BIOS Block
An AMIBIOS fl ash chip consists of a boot sector block and a main BIOS code block
(a main BIOS image). The boot sector block contains critical BIOS codes, including
memory detection and recovery codes for the user to fl ash a new BIOS image if the
original BIOS image is corrupted. When the system power is on, the boot sector
codes execute fi rst. Once it is completed, the main BIOS code will continue with
system initialization and bootup.
Note: Follow the BIOS Recovery instructions below for BIOS recovery when the
main BIOS block crashes. However, when the BIOS Boot sector crashes, you will
need to send the motherboard back to Supermicro for RMA repair.
B-3 Recovery Using a USB-Attached Device
This feature allows the user to recover a BIOS image using a USB-attached device
without additional utilities used. A USB fl ash 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.
To perform UEFI BIOS recovery using a USB-attached device, follow the instruc-
tions below.
Appendix B: UEFI BIOS Recovery
Appendix B
B-1
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