Grant Edwards wrote: > On 2024-04-28, Grant Edwards <grant.b.edwa...@gmail.com> wrote: > >> With DOS disk lables, Grub uses empty space between the boot sector >> and the first partition as a location to store it's core image file. >> That empty space does not exist when using GPT disk label. When using >> a GPT disk label, Grub requires that you need to create a "BIOS Boot" >> or "Grub Boot" partition so that Grub has somwhere to store it's core >> image[1]. > And it bears repeating that the bios/grub boot partition only needs to > be 1 or 2MB in size, is _not_ formatted with a filesystem, and is > _not_ the same as either > > 1) The "boot" directory where the kernel images and grubs other files > are installed within a Linux filesystem. [Which you still need > when booting in Legacy/BIOS mode.] > > or > > 2) The UEFI partition that's formated with a FAT filesystem and used > in UEFI boot mode [which you don't need when booting in > Legacy/BIOS mode.] >
I think I got a grasp on this now. Basically, partitions should be like this. First spot is the alignment thing. Usually a few MBs or so and unused. Grub boot partition with ef02 setting, not to be formatted. /boot partition for kernel and init thingy. Usually 1GB or so, enough for memtest, bootable rescue image etc. / or root partition that is around 150GBs or so. Enough to expand a bit and includes /usr and /var. /home rest of disk unless some needed for something else. Do you recall when running grub-install what that command looks like? Lets say the Grub partition with ef02 setting is sda1, would it be grub-install /dev/sda1 or just sda and it finds the empty partition on its own? That's the only thing I'm not real sure of at this point. I think it is sda. Maybe. ;-) Or is all that above just plain wrong? O-o Dale :-) :-) P. S. Been on tractor with a box blade. Did three very long driveways and a couple short ones. My neighbors have smooth driveways again. :-D
