What's the difference between Gpt+uefi and bios+mbr?

Gpt+uefi is a popular in recent years, a U disk mounted system model, compared with the traditional bios+mbr has a better operability, security, compatibility, scalability and many other advantages, the U disk launch Disk production tool UEFI version came into being, but also support GPT partition, but, gpt+ Uefi and bios+mbr What is the difference, a lot of novice said completely unintelligible what, so quick Start small compiled the following about Gpt+uefi and bios+mbr some obvious difference:

Different points:

1, BIOS+MBR installation system requires that the hard disk as long as there is not hidden, active primary partition can be, and UEFI+GPT requires the hard drive, in addition to the existence of the ESP partition, there must be at least one primary partition;

2, BIOS+MBR Once the system is installed, if the system boot files in a separate partition, this partition can be visible in the operating system, you can also set this partition to be hidden, the system can be started normally, and the UEFI+GPT system boot files in the ESP partition is not visible in the operating system;

The active primary partition for the 3.BIOS+MBR startup requirement is not unique and can optionally set a partition as the active primary partition, and the MBR can then guide the operating system from this partition through the partition table, that is, you can install the operating system on any partition (primary partition, whether active or extended), The operating system can be started from this partition as long as there is any active primary partition, and UEFI+GPT can only place the system boot file in the ESP partition;

The 4.BIOS+MBR system boot files can be in the same partition's root directory as the system files, or not in the same partition as the system files, as long as the system boot file partition is the active primary partition to start the operating system, and UEFI+GPT can only place the system boot file on the ESP partition. and the operating system must be in another primary partition, that is, the UEFI+GPT force requires the system boot file to be separated from the system file, not the same partition;

5. The above figure shows that theoretically gpt+uefi faster than the BIOS+MBR mode, but in fact it is not obvious.

Same point:

The system boot files for both 1.BIOS+MBR and UEFI+GPT can be placed in separate partitions, which are known at the 4th of the different points above;

2.BIOS+MBR system boot files are located in the active primary partition location is not fixed, you can set any partition to meet this condition, uefi+gpt ESP location can be set at will, in the beginning of the hard drive position, middle position, the end, as long as the partition properties and the correct boot file , you can boot the operating system;

The partition of the 3.BIOS+MBR system boot file and the ESP partition of the UEFI+GPT can be assigned any size, rather than ESP must be 100M;

4.BIOS+MBR the ESP partition of a system that is not hidden, active, and uefi+gpt required to install the system can be set up simultaneously, but even if there are multiple partitions of the same attribute, the installer is automatically written to the first one at the time of installation, and starts from the first.

(Note: Use the fast start U disk boot disk GPT under U disk reload system also need to create ESP partition, but no need to create, only in GPT partition is the " create new ESP partition " Hook can automatically create! The following figure shows:)