BIOS UEFI and Legacy

 

UEFI (Unified Extensible Firmware Interface) is a newer standard that replaces the legacy BIOS. UEFI offers more features and benefits, such as faster boot times, better security, larger disk support, and graphical user interface. Legacy BIOS is the old mode that uses a 16-bit code and a limited number of option

You can also look for a setting that enables or disables CSM (Compatibility Support Module), which is a feature that allows legacy BIOS to boot UEFI devices. If you enable CSM, you will switch to legacy BIOS mode. If you disable CSM, you will switch to UEFI mode.

 

MBR2GPT.EXE converts a disk from the Master Boot Record (MBR) to the GUID Partition Table (GPT) partition style without modifying or deleting data on the disk. The tool runs from a Windows Preinstallation Environment (Windows PE) command prompt, but can also be run from the full Windows operating system (OS) by using the /allowFullOS option.

MBR2GPT.EXE is located in the Windows\System32 directory on a computer running Windows.

Open Command Prompt with administrator privileges.

Run the following command: mbr2gpt.exe /convert /allowfullOS

Restart the system and boot into the system BIOS.

Change the settings from Legacy BIOS mode to UEFI mode.

 

If BIOS is UEFI = GPT

Else Legacy  = MBR

 

 

Select “Something else” option (So we can guide to free space harddisk).

a)   Installation of Linux/Root Partition (atleast 20 GB)

Free space > + > Logical (Type of new Partitions)

Partition EXT 4

Mount point And root with forward /

 

b)   If want Hard disk to be used as RAM then (Optional step) May be set as half of your installed RAM

Free space > + > Logical (Type of new Partitions)

Partition SWAP Area

 

C) Home Partition

Free space > + > Logical (Type of new Partitions)

Partition EXT 4

Mount point And root with forward /home

 

 

For UEFI: Choose Windows Boot manager

For Legacy: Choose Top most option  (i.e Linux Boot Manager)

Click on "Install Now"