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Re: Chainload grub to grub?

From: Pascal Hambourg
Subject: Re: Chainload grub to grub?
Date: Mon, 6 Mar 2023 18:34:26 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0

On 06/03/2023 at 17:40, Goh Lip wrote:

*But* I think the problem is the OS you are trying to boot up is in a GPT disk, not a msdos disk as shown by your entries you gave using PARTUUID which can only apply to GPT disks.

# filesystem root=/dev/sda2
menuentry "GNU/Linux, Linux 6.1.15-lfs-11.3" {
   linux /vmlinuz-6.1.15-lfs-11.3 root=PARTUUID=d92d2b64-02 ro

No, this is a fake PARTUUID emulated by the Linux kernel and blkid from a MSDOS partition table (disk identifier + partition number).

Unless you have set up your GPT disk to have a *flagged* BIOS Boot partition, booting in bios-legacy will be a problem.

The lack of a BIOS boot partition only makes GRUB less reliable because it has to use blocklists to load its core image.

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