Re: Chainload grub to grub?

[Pascal Hambourg]

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.