Supermicro X10SDV-TLN4F User Manual Page 105

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Appendix C: UEFI BIOS Recovery
C-1
Appendix C
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.
C-1 An Overview to the UEFI BIOS
The Unied Extensible Firmware Interface (UEFI) specication provides a software-
based interface between the operating system and the platform rmware in the
pre-boot environment. The UEFI speci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, hands-off control to
a computer system at bootup.
C-2 How to Recover the UEFI BIOS Image (-the Main
BIOS Block)
A UEF BIOS ash chip consists of a recovery BIOS block, comprised of two boot
blocks and a main BIOS block (a main BIOS image). The boot block contains critical
BIOS codes, including memory detection and recovery codes for the user to ash
a new BIOS image if the original main BIOS image is corrupted. When the system
power is on, the boot block codes execute rst. Once that 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 boot crashes.
C-3 To Recover the Main BIOS Block 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 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.
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