What is First Boot Device in BIOS?

What is First Boot Device in BIOS?

You can see this option on the Advanced tab of the Award BIOS. Usually it is followed by Second Boot Device and Third Boot Device. For all of them the following values are available: CDROM, Floppy, Hard Disk, Lan, USB-HDD, USB-FDD. In this article we will look at the purpose of these options as well as situations in which they may be useful.

Bootstrap priority settings

.After you turn your computer on, the BIOS starts working first. It polls your computer’s main devices and tests them quickly. Then it starts searching for a bootable device and runs the operating system from it.



The First Boot Device parameter specifies the device from which to start booting first. In other words, it is the primary boot device. Its role can be a hard disk (Hard Disk/HDD), DVD drive (CDROM), flash drive (USB-HDD), Floppy (floppy drive) or Lan (network boot).

First Boot Device in the biosphere what is.

Opportune values



Second Boot Device and Third Boot Device install secondary and tertiary boot devices. They will attempt to boot from them if they fail to boot from the device specified in the First Boot Device.

What value should it stand for?
The right thing to do for First Boot Device is to install a hard drive (SSD drive) on which the operating system is located. This is a Hard Disk value, less commonly called HDD-0.

bios First Boot Device parameter what is it?.

Right value to boot from hard disk

If there is something else there, such as a USB-HDD (flash drive), then at startup all USB flash drives inserted in the computer will be polled first. And because of this, the main operating system may simply not start.

When do I need to change values in First Boot Device?
For example, when installing an operating system or testing a hard disk/operating memory from under DOS. If this is done from the drive, you should set the First Boot Device to CDROM, and if it is from a flash drive, to USB-HDD.

After changing the values, remember to save them by pressing the F10 button.


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