Hi Jude,

There are few decisions you have to make before you consider how to partition 
your disk, which affect where /boot may be located.

1. EFI System Partition (ESP)

This is a GPT partition of type ef00 and formatted as FAT32, necessary for an 
EFI motherboard which is not configured to boot in BIOS/Legacy mode.

This partition will eventually contain the boot manager's filesystem (e.g. 
GRUB, rEFInd) and its efi executable, e.g. grubx64.efi and config file.

It should be mounted under /efi on the installed system.

Therefore what you have done is correct and in accordance with the Gentoo 
Handbook.

2. A partition for /boot

This is not strictly necessary, as the /boot directory can be located in the /
root partition itself.  Most binary distributions do this.  However, Gentoo is 
flexible enough and you can create a separate partition for /boot if you so 
prefer.  Just make sure the /boot partition is mounted when you come to 
install your kernel, initramfs, and emerge linux-firmware.  Assuming you are 
using the GRUB boot manager, you can format a separate /boot partition with 
any of the Linux compatible filesystems:

https://www.gnu.org/software/grub/manual/grub/grub.html#Filesystems

NOTE: With systemd and bootctl you would create a partition of type ea00 
XBOOTLDR and mount it on /boot.  Different OS' will install their kernel 
images in there and bootctl will be able to access them.

3. Manual Alternatives

If you use EFI stub for the UEFI MoBo firmware to boot the system directly 
without a 3rd party bootloader, then you can mount the ESP on /boot and create 
a /boot/EFI directory to place your kernel file executables there.

The default is as per item 1 above.


On Monday, 27 May 2024 10:05:40 BST Jude DaShiell wrote:
> After having followed the handbook I end up with /boot in /sda3 even
> though mount /dev/sda1 /mnt/gentoo/efi had been run and /dev/sda1 is vfat
> 32 format and is efi system.
> What did I do wrong?
> 
> 
> --
>  Jude <jdashiel at panix dot com>
>  "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo.
>  Please use in that order."
>  Ed Howdershelt 1940.

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