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UEFI vs. Legacy: Differences in USB Boot Disk Making

1 min read

When making a USB bootable drive, many people encounter the first choice: Should they use a regular creation tool or choose the UEFI version? For those unfamiliar, regardless of whether they have difficulty making choices, this is a difficult decision, and even some individuals realize they’ve selected the wrong creation tool only after completing the bootable drive, necessitating re-creation.

So, what’s different about the UEFI version? As long as you understand the following questions, the choice presented in the previous text becomes clear.

What kind of computers can use the UEFI version? #

After booting, press the shortcut key to enter the BIOS and check if the computer supports UEFI boot mode. Most computers produced in recent years (after 2011) generally support it.

Differences between UEFI and Legacy #

  1. UEFI is the modern BIOS, while Legacy is the traditional BIOS. UEFI only supports 64-bit systems and requires disk partitioning in GPT mode. Traditional BIOS uses Int 13 interrupts to read disks, only able to read 64KB at a time, making it inefficient. UEFI, on the other hand, can read 1MB at once, leading to faster loading.
  2. The primary feature of UEFI is its graphical interface, which is more user-friendly and allows for graphical operational choices.
  3. The boot process differs. Compared to traditional BIOS (Legacy) boot, UEFI boot mode reduces the BIOS self-test process, thus shortening boot times and providing users with a better startup experience.

Legacy starting mode #

  1. Power-on
  2. Bios initialization
  3. Bios Boot Test
  4. Boot Operating System
  5. Enter the OS

UEFI starting mode #

  1. Power-on
  2. UEFI initialization
  3. Boot Operating System
  4. Enter the OS

What are the advantages of UEFI booting? #

The UEFI boot mode is designed to automatically launch the operating system from a pre-boot environment, displayed in a graphical image mode, providing users with a more convenient and intuitive operation. This simplifies the computer’s startup process, speeds up boot times, and also supports hard drives larger than 2 terabytes. Additionally, UEFI greatly enhances hardware compatibility and contributes to the fast boot speeds of Windows 8 and Windows 10.

How to set up UEFI booting? #

To configure UEFI booting, follow these steps:

  1. Power on the computer and press the designated shortcut key (varies based on the computer) during startup to access the BIOS system.
  2. Navigate to the ‘Boot’ section within the BIOS.
  3. You will see three options: ‘LEGACY only,’ ‘UEFI only,’ and ‘UEFI and LEGACY.’ If you want a pure UEFI boot environment, select ‘UEFI only.’ If you wish to support both UEFI and traditional BIOS booting, choose ‘UEFI and LEGACY.’ Remember to save your changes.

Note: Different computer models might have slight variations in these settings.

Recommended Reading:

  1. Fixed BIOS Freeze in 5 Hours with Self-Taught Method
  2. How UEFI Transforms Boot Speed for Lightning Fast PCs!
  3. Differences between U disk formats FAT32, NTFS, and exFAT
  4. Fix F1 or F2 Boot Issues: Step-by-Step Guide
  5. Resolving NTLDR is Missing Error: A Comprehensive Guide
  6. Improve Your Windows Startup: 3 Effective Tricks
  7. How to Access BIOS on Different Laptop Brands?
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