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1clue
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Joined: 05 Feb 2006
Posts: 2549

PostPosted: Sat Feb 07, 2015 4:29 am    Post subject: Grub mounts wrong /boot. Solved. Reply with quote

Hi,

I bought an SSD and moved my install over to that mostly. I kept the spinner for things like swap or things that don't get used much.

sda is the ssd, which I want to boot completely from.
sdb is the spinner which is older.

This layout as is mounted is the way I want it. The /mnt partition is my old /boot. This isn't the whole partition table but it's what matters for this discussion.

I installed the kernel into /dev/sda2 (which correctly mounts as /boot) and rebooted, got my old kernel and nothing in the list to boot from other than older kernels.

I recompiled again, thinking it was a tatered kernel. Same story.

I copied /boot/grub/grub.cfg to /mnt/grub/grub.cfg, and it boots with the new kernel.

How do I tell the box not to use the grub from /dev/sdb but instead from /dev/sda?

Code:

# lsblk
NAME                    MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda                       8:0    0 447.1G  0 disk
├─sda1                    8:1    0     2M  0 part
├─sda2                    8:2    0   512M  0 part /boot
├─sda3                    8:3    0    10G  0 part /
└─sda4                    8:4    0   420G  0 part
  └─ssdvg1-host_home    253:3    0    10G  0 lvm  /home
sdb                       8:16   0 698.7G  0 disk
├─sdb1                    8:17   0     2M  0 part
├─sdb2                    8:18   0   512M  0 part /mnt
├─sdb3                    8:19   0    10G  0 part
└─sdb4                    8:20   0 688.1G  0 part
  ├─hddvg1-host_swap    253:0    0    24G  0 lvm  [SWAP]
  ├─hddvg1-host_usr_src 253:1    0     5G  0 lvm  /usr/src
  └─hddvg1-mysql        253:2    0     1G  0 lvm 


Code:

# cat /boot/grub/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 $prefix/grubenv ]; then
  load_env
fi
if [ "${next_entry}" ] ; then
   set default="${next_entry}"
   set next_entry=
   save_env next_entry
   set boot_once=true
else
   set default="0"
fi

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 loadfont unicode ; then
  set gfxmode=1920x1080
  load_video
  insmod gfxterm
  set locale_dir=$prefix/locale
  set lang=en_US
  insmod gettext
fi
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
  set timeout_style=menu
  set timeout=10
# Fallback normal timeout code in case the timeout_style feature is
# unavailable.
else
  set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-073ca60e-886c-490d-910b-58ff6e628013' {
   load_video
   if [ "x$grub_platform" = xefi ]; then
      set gfxpayload=keep
   fi
   insmod gzio
   insmod part_gpt
   insmod ext2
   set root='hd0,gpt2'
   if [ x$feature_platform_search_hint = xy ]; then
     search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
   else
     search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
   fi
   echo   'Loading Linux 3.17.7-hardened-r1kr01 ...'
   linux   /vmlinuz-3.17.7-hardened-r1kr01 root=/dev/sda3 ro 
}
submenu 'Advanced options for Gentoo GNU/Linux' $menuentry_id_option 'gnulinux-advanced-073ca60e-886c-490d-910b-58ff6e628013' {
   menuentry 'Gentoo GNU/Linux, with Linux 3.17.7-hardened-r1kr01' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.17.7-hardened-r1kr01-advanced-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      if [ "x$grub_platform" = xefi ]; then
         set gfxpayload=keep
      fi
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.17.7-hardened-r1kr01 ...'
      linux   /vmlinuz-3.17.7-hardened-r1kr01 root=/dev/sda3 ro 
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.17.7-hardened-r1kr01 (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.17.7-hardened-r1kr01-recovery-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      if [ "x$grub_platform" = xefi ]; then
         set gfxpayload=keep
      fi
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.17.7-hardened-r1kr01 ...'
      linux   /vmlinuz-3.17.7-hardened-r1kr01 root=/dev/sda3 ro single
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.13.6-hardened-r3-kr1' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.6-hardened-r3-kr1-advanced-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.13.6-hardened-r3-kr1 ...'
      linux   /kernel-3.13.6-hardened-r3-kr1 root=/dev/sda3 ro 
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.13.6-hardened-r3-kr1 (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.13.6-hardened-r3-kr1-recovery-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.13.6-hardened-r3-kr1 ...'
      linux   /kernel-3.13.6-hardened-r3-kr1 root=/dev/sda3 ro single
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo-kr3' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-kr3-advanced-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.12.13-gentoo-kr3 ...'
      linux   /kernel-3.12.13-gentoo-kr3 root=/dev/sda3 ro 
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo-kr3 (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-kr3-recovery-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.12.13-gentoo-kr3 ...'
      linux   /kernel-3.12.13-gentoo-kr3 root=/dev/sda3 ro single
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo-kr2' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-kr2-advanced-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.12.13-gentoo-kr2 ...'
      linux   /kernel-3.12.13-gentoo-kr2 root=/dev/sda3 ro 
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo-kr2 (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-kr2-recovery-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.12.13-gentoo-kr2 ...'
      linux   /kernel-3.12.13-gentoo-kr2 root=/dev/sda3 ro single
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-advanced-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.12.13-gentoo ...'
      linux   /kernel-3.12.13-gentoo root=/dev/sda3 ro 
   }
   menuentry 'Gentoo GNU/Linux, with Linux 3.12.13-gentoo (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-3.12.13-gentoo-recovery-073ca60e-886c-490d-910b-58ff6e628013' {
      load_video
      insmod gzio
      insmod part_gpt
      insmod ext2
      set root='hd0,gpt2'
      if [ x$feature_platform_search_hint = xy ]; then
        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  73e8bc45-4613-4f80-9ae5-5f78c21a6415
      else
        search --no-floppy --fs-uuid --set=root 73e8bc45-4613-4f80-9ae5-5f78c21a6415
      fi
      echo   'Loading Linux 3.12.13-gentoo ...'
      linux   /kernel-3.12.13-gentoo root=/dev/sda3 ro single
   }
}

### 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.
### 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 ###


Last edited by 1clue on Sat Feb 07, 2015 5:41 pm; edited 1 time in total
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Roman_Gruber
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Joined: 03 Oct 2006
Posts: 3806
Location: Austro Bavaria

PostPosted: Sat Feb 07, 2015 10:57 am    Post subject: Re: Grub mounts wrong /boot Reply with quote

1clue wrote:


How do I tell the box not to use the grub from /dev/sdb but instead from /dev/sda?


I have a very old box but in my days I used to tell my bios where to boot from!

When you power your box the first thing that starts is the bios. Therefore => bios => select the disc where to boot from
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1clue
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Joined: 05 Feb 2006
Posts: 2549

PostPosted: Sat Feb 07, 2015 5:40 pm    Post subject: Reply with quote

That's really embarrassing.

I've been building my own PC hardware since the early 90's. I knew that.

Thanks.
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