Re: Drops to command prompt; configfile /grub2/grub.cfg needed to boot

[Pascal Hambourg]

On 25/07/2024 at 00:11, Brian J. Murrell wrote:
> After having created the new partition and copying the existing boot
> partition's contents to it and then mounting the new partition on /boot
> and editing /boot/grub2/grub.cfg to change all of the "msdos5"
> references to "msdos7" (to reflect the new partition)

You should have regenerated grub.cfg with update-grub(2) instead.

> I went ahead and did a:
>
> # grub2-install --root-directory /boot /dev/sda

It should be --boot-directory (or nothing, as /boot is the default).
--root-directory is an obsolete hidden option which sets the target root 
directory. So I guess you installed GRUB in /boot/boot/grub and $prefix 
is set to (hd0,msdos7)/boot/grub.