[HOW TO] Changing Legacy Boot with MBR to UEFI with GPT Without Reinstall MXLinux [Solved]

[ichsan2895]

It is really high risk operation, I beware to backup the data first, then do this steps:

1. I use Zorin 15.3 KDE for changing MBR to GPT (not from Live USB, I run Zorin when changing MBR to GPT in this case, then I use MXLinux KDE 19.4 (Live USB) to install UEFI bootloader.

2.

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sudo apt-get install gparted

3. Open Gparted then open it. Select one partition to resize it. Allocate about 150MB for new partition called EFI (format it as FAT32)

4.

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sudo gdisk /dev/sdc

where /dev/sdc is your disk which contains MXLinux

5. press w then ENTER to change MBR to GPT
6. press y then ENTER o proceed it
https://lh3.googleusercontent.com/uu_eb ... h7MnmVGrLm

7.

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sudo parted

8.

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print all

Make sure the disk is successful changed to GPT. If it was successful, it will be printed Partition Table : GPT
https://forum.zorin.com/uploads/default ... f286b8.png

9.

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select /dev/sdc

10.

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set 3 esp

where 3 is the number of /dev/sdc3 that contains FAT32 EFI partition. If it was successfull, you should see boot, esp flags on FAT32 EFI partition.
https://forum.zorin.com/uploads/default ... 5bf3cb.png

11.

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quit

for exiting from Parted

12.

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sudo mount /dev/sdc1 /mnt

where /dev/sdc1 is root partition of MXLinux

13.

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sudo mount /dev/sdc3 /mnt/boot/efi

where /dev/sdc3 is EFI filesystem that created previously
https://lh5.googleusercontent.com/VtYpW ... Inmkrgh7oE

14.

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sudo chroot /mnt

15.

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grub-install --target=x86_64-efi --efi-directory=/boot/efi --removable

https://lh4.googleusercontent.com/MIboc ... aH2FC0JOl9

Tested in a SSD Disk (256 GB) which contains 2 OS (MXLinux KDE 19.4 and Zorin Core 15.3). Both was detected by grubloader.



Moderator: images changed to links, please read the forum rules

[ichsan2895]

Why I don't use MX Boot Repair?

Because I got fail and error "could not set up chroot environment" when creating ESP boot loader with MX Boot Repair