As per subject, would like to upgrade my 20.04 install from BIOS to UEFI. I have to do this to leverage re-BAR to then have a quicker/better communication between my videocard and RAM.
I read that I should have to:
- Convert my main disk from MBR -> GPT (would I still be able to boot in BIOS mode after this? Should I simply use gdisk?)
- Resize my current
/partition from 128 GiB to 127 and leave 1 GiB at the beginning for a FAT32/EFI - Mark to first partition to be EFI (Is it the case? How should I do this?)
- Install the new (
.efi) boot loader on there, pointing to my EXT4/partition (How can I do this?) - Ask the motherboard to use EFI instead of BIOS
Am I correct in my understanding? How con I implement points 3 and 4?
I did not mention backups etc etc, but I got a 2 TiB external SSD (should be a fast USB) and I plan to dd if=/dev/nvme1n1 of=/<my temp mount>/backup.img (to do a backup of my 1 TiB main nvme disk - when unmounted of course).
Another strategy would be to convert from MBR -> GPT (still in BIOS mode if possible) and then perform a fresh Ubuntu reinstall preserving /home partition on nvme1n1.
But then I would need to have both my user ids preserved (I have other 4 drives with proper permissions setup and wouldn't want to chown all the way around my filesystem).
What's your recommendation?
Thanks!
Ps. I will upgrade to 22.04 as soon as it will be deemed safe.
