I entered what you suggested to the terminal, no errors but nothing happened.
Regarding the wiki page, I think I misspoke, it’s been a while since I did it.
The problem I had was my Linux partitions came after a large NTFS one on a 3TB GPT disk and GRUB wouldn’t boot from them after install. after quite a bit of digging I found a post (I think in superuser forums) which suggested grub cannot see a boot partition if another large partition comes before it. So I read a bit in the wiki and in the GRUB page, there was a reference to a GPT/BIOS setup.
Under “Bios systems” it says:
On a BIOS/GPT configuration a BIOS boot partition is required. GRUB embeds its core.img into this partition.
It also states it needs to be within the first 2 TB. And that some systems require at least one bootable partition which isn’t ext, I collected data a bit here and a bit there.
I created a 1 MiB partition as suggested but it still didn’t help, so I kept digging until I found another I post which suggested moving the boot partition to the beginning of the disk. So I did (took about 26 hours) and created a bootable EFI fat32 boot partition using the instructions i found in a related page in the wiki, then and only then it finally booted successfully.