BIOS boot and UEFI boot comparison instructions

Source: Internet
Author: User
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What does it mean to start uefi?

In layman's terms, the new motherboard to boot the initialization of the annotation settings, in contrast to the BIOS, the previous U disk boot is for the BIOS, can not guide the UEFI motherboard uefi files to PE, but also some PE to streamline this. The UEFI full name "Unified Extensible Firmware Interface" is a standard for describing type interfaces in detail. This interface is used by the operating system to automatically load an operating system from a pre-boot operating environment.

UEFI Boot is a new motherboard boot entry that is being viewed as a successor to the nearly more than 20-year history of the BIOS. As the name suggests, a quick start can increase the boot speed of the operating system after boot. Due to the UEFI during the boot process, Windows 8 boot into the system will be different from the traditional boot process. After SSD subverts the problem of slow computer startup, Uefi+win8 is likely to overturn our concept of boot speed again.

So uefi start comparing the traditional bios, what are the startup advantages of it? I hope you can read the UEFI start a new understanding, first of all we look at the UEFI of the running process.

UEFI Boot has three advantages over the BIOS boot:

First: Stronger security

The UEFI boot requires a separate partition that isolates the system boot file from the operating system itself, and better protects the system from booting. Even if a system startup error requires reconfiguration, we simply reconfigure the boot partition. And, for the WIN8 system, it creates a trust source between the UEFI security boot and the certificate stored in the firmware and the platform firmware to ensure that a signed and certified "known security" code and a boot loader can be executed near the time the operating system is loaded to prevent users from executing malicious code in the root path.

Second: more flexible startup configuration

Like the EFI boot and grub boot, you can invoke Efishell at startup, where you can load the specified hardware driver and select a startup file. For example, the default startup failure, the boot file on the Efishell loaded USB drive continues to boot the system.

Third: greater support capacity

Traditional BIOS boot is not able to boot more than 2.1TB of hard drives by default because of the MBR limit. With the price of hard drives falling, more than 2.1TB hard drive will gradually become popular, so UEFI start-up is also the main way to start the future.

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