Denys Rondaliev denisrondalev

## mbr-to-gpt-uefi.md

      
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                cjyar
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              May 11, 2024 09:47
            
              
                Convert a disk from MBR to GPT+UEFI, in Linux.
              
          
    Before starting, make sure you have a backup, and make sure to have a linux live boot ready to rescue your system. It's easy to mess this up!

Use gdisk to convert the partition table to GPT.

gdisk /dev/sda


Create the "BIOS boot" partition that GRUB needs.

n to create a new partition. Needs to be about 1MB. You can probably squeeze this in from sectors 34-2047. Use L or l to look up the code for "BIOS boot" (ef02).


Write the new partition table.

w


Reload the partition table.
> partprobe /dev/sda