GRUB2 refusing to boot manually added partition

Sue_Perb · 2021-09-08 17:37:10

Hi

I've been trying recently to free up and use the other half of my disk, which had been taken up by a dormant ubuntu partition. I formatted this partition (/dev/sda5) and then copied my data from arch on /dev/sda6 into it. I'm now trying to boot into it, delete sda6, and extend sda5 to access my full disk from one OS. However, I am having a significant number of issues adding grub menu entries in /etc/grub.d/40_custom.

This implementation shows no error messages, but instead shows a black screen for a second before going back to the grub menu.

menuentry "Arch2" {
        insmod ext4 #NOTE: i tried xfs here as well
        search --set=root --label arch2 --hint hd0, msdos5
        configfile /boot/grub/grub.cfg
}

I've also tried with this, which says "/boot/vmlinuz-linux not found" (it definitely exists there)
i tried /vmlinuz-linux too which had the same result.

menuentry "Arch2" {
        search --set=root --fs-uuid 1f7bdb09-1a34-41dc-9629-dfa69263875c #sda5's fs uuid
        linux /boot/vmlinuz-linux  root=UUID=1f7bdb09-1a34-41dc-9629-dfa69263875c rw splash
        initrd /boot/initramfs-linux.img
}

I've also tried setting root to hd0, msdos1 (my boot partition)

Thank you in advance for any help

Slithery · 2021-09-08 17:52:47

Why not just delete sda5 and use gparted to expand sda6 into the free space?

Raynman · 2021-09-08 17:58:49

Yes, the procedure seems somewhat... roundabout.

But if you have a separate /boot and sda5/6 is the root partition, you should just change the root= kernel parameter and not GRUB's $root.

Sue_Perb · 2021-09-09 19:15:32

Hi

Raynman wrote:

you should just change the root= kernel parameter and not GRUB's $root.

I don't know what you mean by this - I have tried both

set root=(hd0, msdos5) #or msdos1

and

search --set=root=UUID=uuid here

Slithery wrote:

Why not just delete sda5 and use gparted to expand sda6 into the free space?

I thought extending a partition backwards was impossible?

Thank you

Ammako · 2021-09-09 19:17:36

You can extend a partition to the left, it's just risky. Backup your data first in case something goes wrong.

Slithery · 2021-09-09 19:44:50

Sue_Perb wrote:

I thought extending a partition backwards was impossible?

It is impossible to do in one operation. That's why gparted moves it left first and then extends it right,

Sue_Perb · 2021-09-10 17:59:03

Thank you I will try gparted

(I will mark as [SOLVED] if it works)

Arch Linux

#1 2021-09-08 17:37:10

GRUB2 refusing to boot manually added partition

#2 2021-09-08 17:52:47

Re: GRUB2 refusing to boot manually added partition

#3 2021-09-08 17:58:49

Re: GRUB2 refusing to boot manually added partition

#4 2021-09-09 19:15:32

Re: GRUB2 refusing to boot manually added partition

#5 2021-09-09 19:17:36

Re: GRUB2 refusing to boot manually added partition

#6 2021-09-09 19:44:50

Re: GRUB2 refusing to boot manually added partition

#7 2021-09-10 17:59:03

Re: GRUB2 refusing to boot manually added partition

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