Grub Issues (LFS Chapter 8)

Skorpius7 · 08-17-2014, 09:51 AM

Code:

`/boot/grub' is not readable by GRUB on boot. Installation is impossible. Aborting.

So for the past month or so, I've been trying to build LFS through Virtualbox and the old LiveCD they had. After trouble in Chapter 6, I decided to try it out on an actual harddrive, running SalixOS and LFS has been a breeze since. After 2 days of speedily catching up and getting ahead, I've made it to Chapter 8, where the boot stuff occurs (GRUB), but now I have ran into this error. FIrst of all, I am under the impressiont hat this section is optional and I can just edit the current grub loader I have (booting Salix) to load my LFS build instead. Is this true? Anyway, I was wondering if there were any ideas where this error could be coming from? I was digging around a bit and it seems like this error usually results from forgetting to mount certain things. I've assured that everything is mounted (as in chapter 6.2 and 6.2.3) and I am doing this through chroot.

I also tried to ./configure inside the grub source directory and then;

Code:

root:/boot# cd grub/
root:/boot/grub# ls
i386-pc  locale

But still got the same error.

Then I tried to boot with USB according to the instructions on this post (digging through LQ):

Quote:

I skipped this chapter (no grub on mbr) and i boot from usb.. you can use this way if you want:
http://www.supergrubdisk.org/put-sup...-from-windows/

At boot choose "Detect any grub2 configuration file (grub.cfg)" option.

# Begin /boot/grub/grub.cfg
set default=0
set timeout=5

insmod ext2
set root=(hd1,2)

menuentry "GNU/Linux, Linux 3.13.3-lfs-7.5" {
linux /boot/vmlinuz-3.13.3-lfs-7.5 root=/dev/sda2 ro
}

And it recognized both LFS and Salix..but it couldn't successfully boot either of them - just stood still

yancek · 08-17-2014, 04:04 PM

Quote:

root:/boot/grub# ls
i386-pc locale

On the systems I have with grub2, I see at least a grub.cfg file also in that directory.
Also, in each menuentry there should be a separate set root= line. The set root line you posted "set root=(hd1,2)" is sdb2 while on the linux line you have the root=/dev/sda2. I'm really not sure what you are doing here. If you are not able to figure this out, you might do a google for 'bootinfoscript', download and run it from an Linux and post the output here for help. It should output a file called results.txt.

EDDY1 · 08-18-2014, 12:00 AM

Is Salix still bootable?
Is Salix using grub or lilo?

syg00 · 08-18-2014, 12:03 AM

Duplicate of thread on lfs forum.

EDDY1 · 08-18-2014, 12:07 AM

Also after reviewing your grub entry I would assume that your entry for lfs is incorrect

Quote:

menuentry "GNU/Linux, Linux 3.13.3-lfs-7.5" {
linux /boot/vmlinuz-3.13.3-lfs-7.5 root=/dev/sda2 ro

I doubt that it would be /dev/sda2 if you can post output of

Quote:

cat/etc/fstab

&

Quote:

fdisk -l

We will be able to help with your grub/lilo.

colucix · 08-18-2014, 03:02 PM

Please post your thread in only one forum. Posting a single thread in the most relevant forum will make it easier for members to help you and will keep the discussion in one place. This thread is being closed because it is a duplicate. This time I've copied the relevant answers in this thread to the other in LFS forum, but please refrain from doing it in the future.