How to Update the BIOS of the ESX/ESXi host?

Updating the BIOS of the ESX/ESXi host

The steps required to update firmware or a system BIOS varies depending on the hardware vendor and the component to be updated. Typically, the vendor will supply some type of utility that will update the component automatically.

For example, to update a motherboard's BIOS:

Notes:

    Before performing this procedure, ensure to migrate the virtual machines and appliances in the ESX/ESXi host.    

    This a only an example. The results may vary from each manufacturer.

 1. Download the update utility from the vendor.

 2. Create a bootable floppy disk or CD/DVD-ROM that contains the utility.

 3. Physically be in front of the server that hosts ESX/ESXi.

 4. Reboot the host.
   
 5. Access the BIOS of the server.
    Note: You may access the BIOS by pressing F2 or DEL. However, this varies depending on the vendor and is usually displayed on your screen.

 6. Find the System Information section of the BIOS. The location varies depending on vendor.

 7. Note the BIOS version and any other relevant information before upgrading.

 8. Ensure that your BIOS is capable of booting from a floppy or CD/DVD-ROM.

 9. Place the floppy or CD/DVD-ROM in the server and reboot the system. 

 10.Boot from the device and follow the on-screen instructions to update the hardware.

 11.Verify if the firmware/BIOS has been updated.

 12.Proceed with the ESX/ESXi installation or upgrade.