ASUS ESC4000 User Manual

5-2

Chapter 5: BIOS setup

The following utilities allow you to manage and update the motherboard Basic 

Input/Output System (BIOS) setup:
1.  AFUDOS utility (Updates the BIOS in DOS mode using a bootable USB 

flash drive.)

2.  ASUS CrashFree BIOS 3 (To recover the BIOS using a USB flash drive 

when the BIOS file fails or gets corrupted.)

Refer to the corresponding sections for details on these utilities.

Save a copy of the original motherboard BIOS file to a bootable USB flash 

drive in case you need to restore the BIOS in the future. Copy the original 

motherboard BIOS using the AFUDOS utility.

The AFUDOS utility allows you to update the BIOS file in DOS environment using a 

bootable USB flash drive with the updated BIOS file. This utility also allows you to 

copy the current BIOS file that you can use as backup when the BIOS fails or gets 

corrupted during the updating process.

To copy the current BIOS file using the AFUDOS utility:

•  Ensure that the USB flash drive is not write-protected and has at least 2048 

KB free space to save the file.

•  The succeeding BIOS screens are for reference only. The actual BIOS 

screen displays may not be the same as shown.

1.  Copy the AFUDOS utility (afudos.exe) from the motherboard support CD to 

the bootable USB flash drive.

2.  Boot the system in DOS mode, and then at the prompt type:

afudos /o[filename]
where the [filename] is any user-assigned filename not more than eight 

alphanumeric characters for the main filename and three alphanumeric 

characters for the extension name.

3.  Press <Enter>. The utility copies the current BIOS file to the USB flash drive. 

The utility returns to the DOS prompt after copying the current BIOS file.