[SOLVED] LFS6.8 8.4.3. Testing the Configuration

yjy4321 · 02-17-2013, 03:15 PM

I successfully generated /boot/grub/grub.cfg file

Quote:

grub-mkconfig -o /boot/grub/grub.cfg

I restarted with (and removed the lfs-live-cd)

Quote:

/sbin/reboot

It does not show grub> prompt. The computer restarts again and again...
So I put the lfs-live-cd to boot...
How do I do next commands?

Quote:

grub> root (hd0,1)
grub> kernel /boot/grub/core.img
grub> boot

Do I need to do this in the host system or in the chroot?

spiky0011 · 02-17-2013, 03:21 PM

Hi

can you post

Code:

sudo fdisk -l

showing lfs
and fstab and grub.cfg files.
Yes you can do it from chroot

yjy4321 · 02-17-2013, 03:51 PM

from host system

Quote:

fdisk -l
Device Boot Start End Blocks ID System
/dev/hda1 * 1 9480 76148068+ 83 Linux
/dev/hda2 9481 9729 2000092+ 5 Extended
/dev/hda5 9481 9729 2000061 82 Linux swap / Solaris

from chroot

Quote:

$ fdisk -l
Device Boot Start End Blocks ID System
/dev/hda1 * 63 152296199 76148068+ 83 Linux
/dev/hda2 152296200 156296384 2000092+ 5 Extended
/dev/hda5 152296263 156296384 2000061 82 Linux swap / Solaris

$ cat /etc/fstab
/dev/hda1 / ext3 defaults 1 1
/dev/hda5 swap swap pri=1 0 0
proc /proc proc defaults 0 0
sysfs /sys sysfs defaults 0 0
devpts /dev/pts devpts gid=4,mode=620 0 0
tmpfs /dev/shm tmpfs defaults 0 0

$ cat /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
set saved_entry=${prev_saved_entry}
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z ${boot_once} ]; then
saved_entry=${chosen}
save_env saved_entry
fi
}
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "GNU/Linux, with Linux 2.6.37.6-lfs-6.8" --class gnu-linux --class gnu --class os {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
echo Loading Linux 2.6.37.6-lfs-6.8 ...
linux /boot/vmlinux-2.6.37.6-lfs-6.8 root=/dev/hda1 ro
}
menuentry "GNU/Linux, with Linux 2.6.37.6-lfs-6.8 (recovery mode)" --class gnu-linux --class gnu --class os {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
echo Loading Linux 2.6.37.6-lfs-6.8 ...
linux /boot/vmlinux-2.6.37.6-lfs-6.8 root=/dev/hda1 ro single
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

I did not type comments in the first two files...

spiky0011,
What do you mean by showing lfs?

spiky0011 · 02-17-2013, 04:03 PM

Hi

The remark about show your lfs dont matter as thats the only system.

Code:

### BEGIN /etc/grub.d/10_linux ###
menuentry "GNU/Linux, with Linux 2.6.37.6-lfs-6.8" --class gnu-linux --class gnu --class os {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
echo Loading Linux 2.6.37.6-lfs-6.8 ...
linux /boot/vmlinux-2.6.37.6-lfs-6.8 root=/dev/hda1 ro
}
menuentry "GNU/Linux, with Linux 2.6.37.6-lfs-6.8 (recovery mode)" --class gnu-linux --class gnu --class os {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
echo Loading Linux 2.6.37.6-lfs-6.8 ...
linux /boot/vmlinux-2.6.37.6-lfs-6.8 root=/dev/hda1 ro single

You might want to change the red parts to sda1

yjy4321 · 02-17-2013, 04:16 PM

I still don't get grub> prompt.
And where do I issue this command? grub-setup '(hd0)'

Edit:
I did grub-setup '(hd0)' command from chroot. And I get grub menu after reboot, but it prints...

Quote:

Root-NFS: no NFS server address
VFS: Unable to mount root fs via NFS, trying floppy
VFS: Cannot open root device "hda1" or unknown-block(2,0)
Please append a correct "root=" boot options; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Pid: 1, comm: swapper Not tainted 2.6.27.6 #1

spiky0011 · 02-17-2013, 04:50 PM

I would adjust the grub.cfg file as I said then just reboot system

yjy4321 · 02-17-2013, 05:10 PM

I did change as you suggested, but it prints almost same thing... now it says sda1 instead of hda1

Quote:

Root-NFS: no NFS server address
VFS: Unable to mount root fs via NFS, trying floppy
VFS: Cannot open root device "sda1" or unknown-block(2,0)
Please append a correct "root=" boot options; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Pid: 1, comm: swapper Not tainted 2.6.27.6 #1

spiky0011 · 02-17-2013, 05:18 PM

Did you setup grub as per the last part grub-setup /dev/sda

Also in fstab you have hda I would set that to sda as well

yjy4321 · 02-17-2013, 06:09 PM

I changed to /dev/sda on both grub.cfg and fstab files.
The Grub menu appears, but during booting it shows...

Quote:

Root-NFS: no NFS server address
VFS: Unable to mount root fs via NFS, trying floppy
VFS: Cannot open root device "sda1" or unknown-block(2,0)
Please append a correct "root=" boot options; here are the available partitions:
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
Pid: 1, comm: swapper Not tainted 2.6.27.6 #1

What can I do now? What is VFS? Is this related to grub?

alexchen · 02-18-2013, 07:54 AM

The VFS is Virtual File System ,you can see the Documentation in /usr/src/linux-version/Documentation/filesystems/vfs.txt
When you boot system ,the kernel can not find the /dev/sda1 so it panic

alexchen · 02-18-2013, 07:57 AM

After LFS , Do you run the command grub-install /dev/hda ???

yjy4321 · 02-19-2013, 11:28 PM

http://www.linuxfromscratch.org/lfs/...er08/grub.html
Starting 8.4 I will show you what I did...

Code:

grub-mkdevicemap --device-map=device.map
cat device.map

It outputs

Quote:

(hd0) /dev/hda

Then I did

Code:

grub-install --grub-setup=/bin/true /dev/hda

If I try with sda, then it gives two messages like

Quote:

/usr/sbin/grub-probe: error: cannot stat '/dev/sda'.
Instalation finished. No error reported.

They do not match...

Then I did...

Code:

grub-mkconfig -o /boot/grub/grub.cfg

It outputs

Quote:

Generating grub.cfg ...
Found linux image: /boot/vmlinux-2.6.37.6-lfs-6.8
done

Quote:

cat /boot/grub/grub.cfg

#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#

### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="0"
if [ ${prev_saved_entry} ]; then
set saved_entry=${prev_saved_entry}
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi

function savedefault {
if [ -z ${boot_once} ]; then
saved_entry=${chosen}
save_env saved_entry
fi
}
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
set locale_dir=($root)/boot/grub/locale
set lang=en
insmod gettext
set timeout=5
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry "GNU/Linux, with Linux 2.6.37.6-lfs-6.8" --class gnu-linux --class gnu --class os {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
echo Loading Linux 2.6.37.6-lfs-6.8 ...
linux /boot/vmlinux-2.6.37.6-lfs-6.8 root=/dev/hda1 ro
}
menuentry "GNU/Linux, with Linux 2.6.37.6-lfs-6.8 (recovery mode)" --class gnu-linux --class gnu --class os {
insmod ext2
set root='(hd0,1)'
search --no-floppy --fs-uuid --set 9ecf32d3-e02d-4f95-b0ef-ef3775c9bd2b
echo Loading Linux 2.6.37.6-lfs-6.8 ...
linux /boot/vmlinux-2.6.37.6-lfs-6.8 root=/dev/hda1 ro single
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###

### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

Like spiky0011 said, I changed from root=/dev/hda1" to "root=/dev/sda1" Should I also change from set root='(hd0,1)' to set root='(sd0,1)'?

From here, I do not know how to do section 8.4.3. So I skip that...

If I need to do this, then please let me know how to get to that prompt.

Next I did...

Code:

grub-setup '(hd0)'

If I try with '(sd0)', then it gives error like...

Quote:

grub-setup: error: no mapping exists for 'sd0'.

Please any help would be great!!!

spiky0011 · 02-20-2013, 01:51 AM

Hi

set root=hd0,1 is correct
run

Code:

grub-setup /dev/hda

When you reboot dose it still panic?

Make sure your grub.cfg and /etc/fstab have the same settings
hda1 or sda1
I would try both options hda1 try that 1st
if not try sda1

alexchen · 02-20-2013, 04:16 AM

Use root=/dev/hda1

stoat · 02-20-2013, 08:50 AM

Some things to think about...

One is that IDE and SATA devices have been using the same libata driver code for a long time. Back when that happened, we stopped using /dev/hdx notation forever. There is no harm in trying, but I wouldn't make too much out of a failure with trying that.

Next, at least some GRUB boot loader seems to be installed and working, or else it wouldn't get as far as it does in booting. So to me, the efforts having to do with re-installing GRUB somewhere (e.g., grub-setup, grub-install) probably aren't doing much for the unable-to-mount issue.

Lastly, this unable-to-mount issue sometimes has been related to failing to configure the devtmpfs filesystem in the kernel. Or perhaps forgetting to configure support even for the main partition's filesystem. I would review the kernel's config for that stuff.