Doubts regarding UEFI bootloader

[Sunil_94]

Hey guys, I was reading stuff regarding UEFI and MBR bootloaders. I understood that MBR type makes a system reserve storage of around 350MB in the starting of the hard disk in order to save info on how to/ from where to load the OS and how sectors are arranged. so now UEFI. I understood after studying a lot that they use GPT(GUID-globally unique identifiers[128 bit hexadecimal digits] partition tables) type to store whatever it wants. so my doubt is,

1. Does UEFI mode also block some volume in the HDD as a reserve?
2. If it does, where is it? in the starting sector of HDD? or somewhere else?

 

[Rogue Leader]

GPT does make some reserves in the beginning sectors of the HDD, usually about 500mb IIRC. If you want to have a drive bigger than 2.2TB you need to use GPT.

 

[Sunil_94]

GPT does make some reserves in the beginning sectors of the HDD, usually about 500mb IIRC. If you want to have a drive bigger than 2.2TB you need to use GPT.

hmm.. Thank you! I checked, it had 260MB GPT reserve. So what if i am using UEFI with legacy mode? does it store extra 300MB in the starting apart from 260MB for GPT??

 

[Rogue Leader]

UEFI BIOS in legacy mode will not allow you to format the drive in GPT.

 

[Sunil_94]

UEFI BIOS in legacy mode will not allow you to format the drive in GPT.

I tried to install linux on other partition in my HDD, it was not supporting UEFI, so i booting in legacy mode and installed it anyways. can u plz explain how this works?

 

[Rogue Leader]

I dont understand what you are asking me or are trying to do.