Arch Linux

mac41

Member

Registered: 2023-06-22

Posts: 10

Boot partition in a BIOS/MBR system for use with GRUB & LUKS

I've been following guides on the wiki for setting up a BIOS/MBR system with full disk encryption (#LUKS on a partition), with GRUB as bootloader.However, I noticed that at no point do any of the guides provide clear instructions on creating the necessary boot partition for this scenario. Since the boot partition must be unencrypted and accessible during boot, I’m wondering if this step is missing or assumed.  Specifically, for a BIOS system with an MBR partition table, how should I create the boot partition in fdisk before the formatting step? On a BIOS/GPT setup with GRUB for example, the partition type must be set to BIOS boot, but this is not my case.

Head_on_a_Stick

Member

From: The Wirral

Registered: 2014-02-20

Posts: 8,339

Website

Re: Boot partition in a BIOS/MBR system for use with GRUB & LUKS

GRUB can handle an encrypted /boot/:

https://wiki.archlinux.org/title/GRUB#Encrypted_/boot

On a BIOS/GPT setup with GRUB for example, the partition type must be set to BIOS boot

A BIOS boot partition is not a /boot/ partition, it is an area reserved to hold GRUB's core.img and is not part of the installed system.

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