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Desktop 5130DQ-IL User's Manual
D.2 BIOS Boot Block
This motherboard supports the Dual Boot Block feature, which is a last-ditch mechanism to
recover the 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 a BIOS update, you can still reboot the system by activating switch
JBR1 on the motherboard. When JBR1 is activated, the system will boot from a backup boot
block pre-loaded in the BIOS by the manufacturer.
Rebooting the System with JBR1
1. Power down the system.
2. Set the JBR1 switch to ON and power on the system.
3. Follow the BIOS recovery procedure listed in the previous section of this Appendix C.
4. After completing the steps above, power down the system.
5. Turn JBR1 OFF and power on the system.
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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%)
