Appendix E Dual Boot Block; Bios Boot Block; Bios Boot Block Corruption Occurrence - Supermicro X11SSH-F User Manual

X11SSH-F/-LN4F User Manual
E.1 Introduction
This motherboard supports the Dual Boot Block feature, which is the last-ditch mechanism
to recover the BIOS boot block. This section provides an introduction to the feature.

BIOS Boot Block

A BIOS boot block is the minimum BIOS loader required to enable necessary hardware
components for the BIOS crisis recovery flash that will update the main BIOS block. An on-
call BIOS boot-block corruption may occur due to a software tool issue (see image below)
or an unexpected power outage during BIOS updates.

BIOS Boot Block Corruption Occurrence

When a BIOS boot block is corrupted due to an unexpected power outage or a software tool
malfunctioning during BIOS updates, you can still reboot the system by closing pins 2 and 3
using a cap on jumper JBR1. When JBR1 is set to pins 2 and 3, the system will boot from a
backup boot block pre-loaded in the BIOS by the manufacturer.
Appendix E
Dual Boot Block
120