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conoscenza
Tux's lil' helper
Joined: 25 Dec 2011
Posts: 105
Location: Spinazzola (bt) | Brescia | Parma
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 Posted: Sun Apr 08, 2012 8:39 pm Post subject: how to chainloader |
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hi to all.
I don't understand how to chainloader in my pc.
there 3 SO: windows, a distro by slackware and gentoo.
This is my output:
| Quote: |
blkid
/dev/sda1: UUID="9AEC72D6EC72AC5F" TYPE="ntfs"
/dev/sda2: LABEL="HP_RECOVERY" UUID="04B262BDB262B33A" TYPE="ntfs"
/dev/sda4: UUID="ac14f7c7-0570-464f-b75d-4f5dd5a31602" TYPE="swap"
/dev/sda5: LABEL="boot" UUID="3f6da8d8-d003-4eb8-b429-cffeff309ba7" TYPE="ext2"
/dev/sda6: LABEL="Gentoo" UUID="99d78743-8b92-4db6-81cf-acb6239ceb71" TYPE="ext4"
/dev/sda7: LABEL="home" UUID="2f25d262-dffe-4a6a-b5bb-48340afadfb2" TYPE="ext4"
/dev/sda8: LABEL="boot Salice" UUID="14610283-7603-47e4-bc75-1d43830d1077" TYPE="ext2"
/dev/sda9: LABEL="Salice X" UUID="cf256b0c-9779-4386-b499-9dfd55400ed9" TYPE="ext4"
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from distro by slackware:
| Quote: |
grub-mkconfig -o /boot/grub/grub.cfg
Generating grub.cfg ...
Found background: /boot/grub/salix.jpg
Found linux image: /boot/vmlinuz-huge-2.6.37.6
No volume groups found
Found Windows Vista (loader) on /dev/sda1
Found Windows Vista (loader) on /dev/sda2
Found Gentoo Base System release 2.0.3 on /dev/sda6
done
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and it generated:
| Quote: |
cat /boot/grub/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
set default="${saved_entry}"
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
}
function load_video {
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
}
insmod part_msdos
insmod ext2
set root='(hd0,msdos9)'
search --no-floppy --fs-uuid --set=root cf256b0c-9779-4386-b499-9dfd55400ed9
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set=root 14610283-7603-47e4-bc75-1d43830d1077
set locale_dir=($root)/grub/locale
set lang=it_IT
insmod gettext
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set=root 14610283-7603-47e4-bc75-1d43830d1077
insmod jpeg
background_image -m stretch /grub/salix.jpg
set timeout=5
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Salix 13.37.0 GNU/Linux, con Linux 2.6.37.6' --class salix --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set=root 14610283-7603-47e4-bc75-1d43830d1077
echo 'Caricamento Linux 2.6.37.6...'
linux /vmlinuz-huge-2.6.37.6 root=/dev/sda9 ro vt.default_utf8=1 resume=/dev/sda4 quiet vga=791
}
menuentry 'Salix 13.37.0 GNU/Linux, con Linux 2.6.37.6 (modalità ripristino)' --class salix --class gnu-linux --class gnu --class os {
load_video
set gfxpayload=keep
insmod gzio
insmod part_msdos
insmod ext2
set root='(hd0,msdos8)'
search --no-floppy --fs-uuid --set=root 14610283-7603-47e4-bc75-1d43830d1077
echo 'Caricamento Linux 2.6.37.6...'
linux /vmlinuz-huge-2.6.37.6 root=/dev/sda9 ro single vt.default_utf8=1 resume=/dev/sda4
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Windows Vista (loader) (on /dev/sda1)" --class windows --class os {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos1)'
search --no-floppy --fs-uuid --set=root 9AEC72D6EC72AC5F
chainloader +1
}
menuentry "Windows Vista (loader) (on /dev/sda2)" --class windows --class os {
insmod part_msdos
insmod ntfs
set root='(hd0,msdos2)'
search --no-floppy --fs-uuid --set=root 04B262BDB262B33A
chainloader +1
}
menuentry "Gentoo Linux 3.2.12 (on /dev/sda6)" --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 99d78743-8b92-4db6-81cf-acb6239ceb71
linux /boot/kernel-3.2.12-gentoo root=/dev/sda6
}
### 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 ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
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and grub.conf in Gentoo is:
| Quote: |
cat /boot/grub/grub.conf
# This is a sample grub.conf for use with Genkernel, per the Gentoo handbook
# http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?part=1&chap=10#doc_chap2
# If you are not using Genkernel and you need help creating this file, you
# should consult the handbook. Alternatively, consult the grub.conf.sample that
# is included with the Grub documentation.
default 0
timeout 1
#splashimage=(hd0,0)/boot/grub/splash.xpm.gz
title Gentoo Linux 3.2.12
root (hd0,5)
kernel /boot/kernel-3.2.12-gentoo root=/dev/sda6
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and:
| Quote: |
ls -la /boot/
totale 4768
drwxr-xr-x 4 root root 4096 1 apr 22.55 .
drwxr-xr-x 20 root root 4096 23 feb 00.38 ..
-rw-r--r-- 1 root root 0 27 mar 21.39 .keep
lrwxrwxrwx 1 root root 1 26 mar 21.08 boot -> .
drwxr-xr-x 2 root root 4096 4 apr 00.55 grub
-rw-r--r-- 1 root root 4841392 1 apr 22.55 kernel-3.2.12-gentoo
drwx------ 2 root root 16384 21 feb 23.24 lost+found
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Why when I choose to boot Gentoo from salix's grub, I have an error "file not found".
what is wrong?
thanks to all...
EDIT:
I run:
| Quote: |
#grep -v rootfs /proc/mounts > /etc/mtab
# grub-install --no-floppy /dev/sda5
Installation finished. No error reported.
This is the contents of the device map /boot/grub/device.map.
Check if this is correct or not. If any of the lines is incorrect,
fix it and re-run the script `grub-install'.
(fd0) /dev/fd0
(hd0) /dev/sda
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to install grub on gentoo system. |
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Arkhelion
Apprentice
Joined: 07 Sep 2010
Posts: 151
Location: France
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| Posted: Mon Apr 09, 2012 8:30 am Post subject: |
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Why do you try to install 2 GRUB? One is enough.
_________________
Arkhelion |
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conoscenza
Tux's lil' helper
Joined: 25 Dec 2011
Posts: 105
Location: Spinazzola (bt) | Brescia | Parma
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| Posted: Mon Apr 09, 2012 8:44 am Post subject: |
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Because I've 2 Linux systems and each one have their kernels.
I try to edit the section:
| Quote: |
menuentry "Gentoo Linux 3.2.12 (on /dev/sda6)" --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 99d78743-8b92-4db6-81cf-acb6239ceb71
linux /boot/kernel-3.2.12-gentoo root=/dev/sda6
} |
in:
| Quote: |
menuentry "Gentoo Linux 3.2.12 (on /dev/sda6)" --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 99d78743-8b92-4db6-81cf-acb6239ceb71
linux /boot/kernel-3.2.12-gentoo root=/dev/sda6
chainloader +1
}
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but I've the same error... "File not found".
How should I edit its? |
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Veldrin
Veteran
Joined: 27 Jul 2004
Posts: 1945
Location: Zurich, Switzerland
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| Posted: Mon Apr 09, 2012 9:03 am Post subject: |
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why not unify their boot partitions and grub installations into one?
your command wont work like this.
chainloader essentially tells the bootloader to load another bootloader located a somewhere.
in a nutshell, it should look like this. assuming that your chainloader target is in/on (hd0,1)
| Code: | menuentry "Linux" {
insmod chain
insmod ext2
set root=(hd0,1)
chainloader +1
}
|
_________________
read the portage output!
If my answer is too concise, ask for an explanation. |
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conoscenza
Tux's lil' helper
Joined: 25 Dec 2011
Posts: 105
Location: Spinazzola (bt) | Brescia | Parma
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| Posted: Mon Apr 09, 2012 9:07 am Post subject: |
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| Veldrin wrote: | | why not unify their boot partitions and grub installations into one? |
I installed this SO because I to do some test. I would indipendet system... maybe a day I'll create an unique partition.
Anyway I edit, in the first grub, the section:
| Quote: |
menuentry "Gentoo Linux 3.2.12 (on /dev/sda6)" --class gnu-linux --class gnu --class os {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 99d78743-8b92-4db6-81cf-acb6239ceb71
linux /boot/kernel-3.2.12-gentoo root=/dev/sda6
}
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in:
| Quote: |
menuentry 'Gentoo grub' {
set root='(hd0,5)'
chainloader +1
}
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right? |
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conoscenza
Tux's lil' helper
Joined: 25 Dec 2011
Posts: 105
Location: Spinazzola (bt) | Brescia | Parma
|
| Posted: Mon Apr 09, 2012 10:57 am Post subject: |
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But the boot partion of Gentoo is /dev/sda5 and the root partition /dev/sda6.
I believe that I don't understand this grub method!
EDIT: ...there's another messagge before!
Last edited by conoscenza on Mon Apr 09, 2012 11:02 am; edited 1 time in total |
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conoscenza
Tux's lil' helper
Joined: 25 Dec 2011
Posts: 105
Location: Spinazzola (bt) | Brescia | Parma
|
| Posted: Mon Apr 09, 2012 11:01 am Post subject: |
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| Veldrin wrote: |
in a nutshell, it should look like this. assuming that your chainloader target is in/on (hd0,1)
| Code: | menuentry "Linux" {
insmod chain
insmod ext2
set root=(hd0,1)
chainloader +1
}
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insmod chain... is used by "chainloader +1"?
In my case I edit in:
| Quote: |
menuentry "Linux" {
insmod chain
insmod ext2
set root=(hd0,5)
chainloader +1
}
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/dev/sda5 is Gentoo's boot
/dev/sda6 is Gentoo's root |
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Veldrin
Veteran
Joined: 27 Jul 2004
Posts: 1945
Location: Zurich, Switzerland
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| Posted: Mon Apr 09, 2012 11:03 am Post subject: |
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it only cares about where grub is installed. honestly I never tried it on a partition, I always used the mbr.
V.
_________________
read the portage output!
If my answer is too concise, ask for an explanation. |
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conoscenza
Tux's lil' helper
Joined: 25 Dec 2011
Posts: 105
Location: Spinazzola (bt) | Brescia | Parma
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| Posted: Mon Apr 09, 2012 11:10 am Post subject: |
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I run:
grub-install --no-floppy /dev/sda5
to install grub into boot partition.
But I'm thinking need to specify the option "--boot-directory"... |
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