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slackline
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Location: /uk/sheffield

PostPosted: Wed Nov 14, 2012 4:31 pm    Post subject: GRUB2 on root partition Reply with quote

Hi,

I'm stuck with Grub2 again after having to have the HD replaced under warranty
I posted further up in this thread a solution to my install problems was to simply do away with a separate boot partition and install it on the main root partition (i.e. /boot resides under the main partition of /).

So as this is a fresh install I opted to only create two partitions, root (/) and one for data (I.e. /home)....

Code:

/dev/sda1            /             ext4           noatime     0 1
/dev/sda2            /home         ext4           noatime     0 2


I'm in a chroot'd environment, having mounted /dev/sda1 at /mnt/gentoo and /dev/sda2 at /mnt/gentoo/home and then chroot.

I've compiled my kernel and copied it to the /boot/ directory using the following...

Code:

#!/bin/sh
exec tail -n +3 $0
menuentry "Gentoo 3.6.6" {
    insmod ext2
    search --no-floppy
    linux /boot/3.6.6 root=/dev/sda1 rootfstype=ext4 libachi.ignore_sss=1 i915.i915_enable_rc6=1
}


...and I make the configuration file with...

Code:

# grub2-mkconfig -o /boot/grub2/grub.cfg
Generating grub.cfg
done
# cat /boot/grub2/grub.cfg
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub2-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 [ x"${feature_menuentry_id}" = xy ]; then
  menuentry_id_option="--id"
else
  menuentry_id_option=""
fi

export menuentry_id_option

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 {
  if [ x$feature_all_video_module = xy ]; then
    insmod all_video
  else
    insmod efi_gop
    insmod efi_uga
    insmod ieee1275_fb
    insmod vbe
    insmod vga
    insmod video_bochs
    insmod video_cirrus
  fi
}

if [ x$feature_default_font_path = xy ] ; then
   font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos1'
if [ x$feature_platform_search_hint = xy ]; then
  search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  b7ac1d8e-a726-4b27-8d16-90f605e86aae
else
  search --no-floppy --fs-uuid --set=root b7ac1d8e-a726-4b27-8d16-90f605e86aae
fi
    font="/usr/share/grub/unicode.pf2"
fi

if loadfont $font ; then
  set gfxmode=auto
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_US
  insmod gettext
fi
terminal_output gfxterm
if sleep --interruptible 0 ; then
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###

### 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 ###
### 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.
menuentry "Gentoo 3.6.6" {
    insmod ext2
    search --no-floppy
    linux /boot/3.6.6 root=/dev/sda1 rootfstype=ext4 libahci.ignore_sss=1 i915.i915_enable_rc6=1
}
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f  ${config_directory}/custom.cfg ]; then
  source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
  source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom


However I'm finding I can't actually install as this continually fails...

Code:

# grub2-install  /dev/sda
source_dir doesn't exist. Please specify --target or --directory


I've tried the following variants, none of which work....

Code:

# grub2-install --target=/dev/sda1
source_dir doesn't exist. Please specify --target or --directory
# grub2-install --target=/dev/sda1 --directory=/boot/
/usr/sbin/grub2-install: line 337: /boot//modinfo.sh: No such file or directory
# grub2-install --directory=/dev/sda1
source_dir doesn't exist. Please specify --target or --directory
# grub2-install --directory=/boot   
/usr/sbin/grub2-install: line 337: /boot/modinfo.sh: No such file or directory


As I read last time if /boot is on its own partition this should only be mounted after chrooting, but in this instance as I've opted not to have a separate /boot partition that is obviously impossible (isn't it?) as I have to mount the partition before I can chroot into it.

Any pointers on how to solve this appreciated as I can't see that I'm doing anything different from lasts time.

Thanks in advance,

slack
_________________
"Science is what we understand well enough to explain to a computer.  Art is everything else we do." - Donald Knuth


Last edited by slackline on Thu Nov 15, 2012 7:31 am; edited 1 time in total
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slackline
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Joined: 01 Apr 2005
Posts: 1319
Location: /uk/sheffield

PostPosted: Wed Nov 14, 2012 5:35 pm    Post subject: Reply with quote

Ok, I seem to have got this to install now using...

Code:

# grub2-install --directory=/usr/lib/grub/i386-pc/ /dev/sda
Installation finished. No error reported.


Fingers crossed for the reboot, if it works I'll report back and file a bug
_________________
"Science is what we understand well enough to explain to a computer.  Art is everything else we do." - Donald Knuth
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