1, uefi:uefi is the new BIOS.
2.legacy:legacy is a traditional BIOS.
Second, the running time is different.
1, uefi: Running process uefi:UEFI means that the computer is turned on, and then UEFI is initialized, which directly goes to the startup to repair the system and finally enters the system.
2.legacy:Legacy runs a complicated process, starting the computer, then initializing through BIOS, then self-checking through BIOS, then booting the operating system, and finally entering the system.
Third, the requirements are different.
1, uefi:uefi only supports 64, because the system and disk partition must be in gpt mode.
2. Traditional: Systems installed in traditional mode can only enter the system in traditional mode.