SUPER MICRO Computer C7Z87-OCE user manual Bios Boot Block Corruption Occurrence

Appendix D: Dual Boot Block

Appendix D

Dual Boot Block

D-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.

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AMI Firmware Update Utility vX.XX.XX

Copyright (C)XXXX American Megatrends Inc. All Rights Reserved.

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Reading flash	. . . . . . . . . . done
-- ME Data Size checking . ok
-- FFS checksums	ok
Erasing Boot Block	. . . done
__Updating Boot Block	. . . 0x00A91000 (13%)

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.

D-1