X11SSL datasheet(119/124 Pages) ETC1

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Appendix D: UEFI BIOS Recovery

119

Appendix D

UEFI BIOS Recovery

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 add-on card 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 below for BIOS recovery when the main

BIOS block crashes.

Note 2: When the BIOS recovery block crashes, you will need to follow the procedures

to make a Returned Merchandise Authorization (RMA) request. (For a RMA request,

please see section 3.5 for more information). Also, you may use the Supermicro Up-

date Manager (SUM) Out-of-Band (OOB) (https://www.supermicro.com.tw/products/

nfo/SMS_SUM.cfm) to reflash the BIOS.

D.3 Recovering the Main BIOS Block with a USB Device

This feature allows the user 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.

X11SSL Datasheet(PDF) 119 Page - List of Unclassifed Manufacturers