Dual BIOS

Dual BIOS

 

            Dual BIOS refers to two physical BIOS ROMs. One chips acts as your "Main" BIOS, or the BIOS your system primarily uses during boot up.

            Second chip acts as a "Backup" BIOS and has the factory default BIOS version on it. If the "Main" BIOS fail or stops functioning, the "Backup" will automatically take over during the next system boot.

Why Motherboards need a Dual BIOS Technology.

     1.Virus Attacks- New computer viruses and destroy the system BIOS. They may corrupt the BIOS code, causing the PC to become unstable or boot abnormally. 

    2.BIOS Upgrade Failures- BIOS data may be corrupted If: a power loss/surge occurs, user resets the system, power button is pressed during the process of performing a system BIOS upgrade.

    3.Incorrect BIOS Version  Upgrade- If a user mistakenly updates their main board with the incorrect BIOS file, the system may not be able to boot correctly. That's why This may cause the system to hang during operation.

    4.Upgrading of Peripherals- A flash ROM's life cycle is limited according to electronic characteristics. The modern PC utilizes the Plug and Play BIOS and is updated regularly. If a user changes  peripherals often, there is a slight chance of damage to the flash ROM.

How to use Dual BIOS?

                The dual BIOS screen opens and displays the following options as shown in this screenshot.

Dual BIOS Item explanation:

1. Wide Range Protection: Disabled (Default), Enabled- If any failure occurs in the Main BIOS, after the system is powered and just before the Operating System is loaded and the Wide Range Protection is set to "Enabled", the PC will boot from the Backup BIOS automatically.

2. Halt On BIOS Defects- If the BIOS encounters a checksum error or the Main BIOS incurs a WIDE RANGE PROTECTION error and Halt On BIOS Defects set to Enable, the PC will show messages on the boot screen and the system will pause and wait for user's instruction.

3. Auto Recovery: Enabled(Default), Disabled- When a checksum error occurs on either, the Main BIOS or Backup BIOS, the working BIOS will automatically recover the BIOS of checksum failure.