I already installed Zorin 15.3 core in my portable SSD (via USB 3 port) which is formatted by MBR partition system. Yes of course I must boot it from legacy boot since my computer is old and its not support UEFI.
But recently, I will use other computer which doesn't have legacy boot (just UEFI).
The question are :
how to change MBR to GPT format without formatted my SSD since I know UEFI wont work on MBR
After I success do first step, how to get boot from UEFI since I don't have EFI boot partition
Recently I installed boot-repair as suggested by this thread [Zorin OS 16 Core install Failed to open EFI boot - invalid parameter - #7 by user64463 ]sudo apt-get install boot-repair
But, I think, the software was too advance + I don't see UEFI option
Have you created an EFI Partition on the SSD?
Have you created an EFI Partition on the SSD?
No, I haven't make it yet since it was MBR formatted partition disk
Using a windows live image you can use the MBRtoGPT application. On Linux, you will have to do a little more:
Regardless of what you want and hope to do, backup, just in case.
You will have to be in a live image either way because the disk can't be mounted (any partition) when you modify the partition table.
I will take a look with this suggestion. Thank you
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Its really difficult to do that, but after one month, I did it
It is really high risk operation, I beware to backup the data first, the do this steps:
sudo apt-get install gparted
Open gparted the open it. Select one partition to resize it. Allocate about 150MB for new partition called EFI (format it as FAT32)
sudo gdisk /dev/sdc
where /dev/sdc is your disk which contains Zorin
type w then [enter] to change MBR to GPTy then [enter] to proceed it
sudo parted
print all
to see where is the disk & partition number for EFI partition FAT32
select /dev/sdc
set 3 esp
where 3 means the number of /dev/sdc3 which contains FAT32 EFI. If it was success, you should see boot, esp on your FAT32 partition
print all will print all disk in your computer, you will see Partition table : GPT if your disk have successfully changed to GPT
Open terminal then type :
sudo mount /dev/sdc1 /mnt
where /dev/sdc1 is root partition of Zorin
sudo mount /dev/sdc3 /mnt/boot/efi
where /dev/sdc3 is EFI filesystem that created previously
sudo chroot /mnt
grub-install --target=x86_64-efi --efi-directory=/boot/efi --removable
system
1 April 2023 05:42
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