On Tue, Aug 29, 2017 at 07:57:09AM -0400, Hendrik Boom wrote:
> On Tue, Aug 29, 2017 at 07:40:06AM -0400, Hendrik Boom wrote:
> >
> > It's as if grub-update found the new system, but for perverse reasons
> > still used the /etc/fstab in the old system instead of the one in the
> > new system. And yes, I exclude /etc/fstab from the rsyc operation.
> > The new one is definitely still different from the old one.
> >
> > Next I'll check whether /boot/grub/grub.cfg refers to the proper
> > partitions. That should narrow down the possibilities.
>
> /boot/grub/grub.cfg does not appear to refer to the correct partitions,
> A few lines from the /boot/grub/grub.cfg:
>
> submenu 'Advanced options for unknown Linux distribution (on /dev/mapper/jessie-ascii--root)' $menuentry_id_option 'osprober-gnulinux-advanced-c6f30bc1-91d8-4d44-a5ff-ecd38a92b076' {
> menuentry 'Devuan GNU/Linux (on /dev/mapper/jessie-ascii--root)' --class gnu-linux --class gnu --class os $menuentry_id_option 'osprober-gnulinux-/vmlinuz-3.16.0-4-686-pae--c6f30bc1-91d8-4d44-a5ff-ecd38a92b076' {
Those two lines tell me it has found the proper root partition for the
new system. jessie-ascii-root ot the right one, and its uuid is indeed c6f3...
> insmod part_msdos
> insmod ext2
> set root='hd0,msdos7'
And this is the proper boot partition for the new system.
> if [ x$feature_platform_search_hint = xy ]; then
> search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos7 --hint-efi=hd0,msdos7 --hint-baremetal=ahci0,msdos7 a0f7f7ef-d766-48fe-93fd-c1e1a4da1c85
> else
> search --no-floppy --fs-uuid --set=root a0f7f7ef-d766-48fe-93fd-c1e1a4da1c85
and that's its uuid.
> fi
> linux /vmlinuz-3.16.0-4-686-pae root=/dev/mapper/jessie-devuan--root ro quiet
But then, having found all the proper partitions, it just puts the wrong one
on the linux command.
I'm tempted to hand-edit this, just to get things going.
But I hate to leave an unsolved problem in an area as critical as bootup.
It's probably going to bite me as the grub.cfg gets updated wrong
someday in a moment of inattention.
> initrd /initrd.img-3.16.0-4-686-pae
> }
>
> The search command has the proper UUID for the new /boot partition.
>
> The linux command specifies root=/dev/mapper/jessie-devuan--root, which
> is the old root partition. So it will boot from the new system's /boot
> using the old system's root partition which of course contains the old
> /etc/fstab with all the old partitions.
>
> So it looks as if grub-update is not doing the right thing.
> Still need to figure out why.
>
> -- hendrik
>
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Re: [DNG] using os-prober
