Re: Boot problem : Operating System not found.

To: debian-user@lists.debian.org
Subject: Re: Boot problem : Operating System not found.
From: Bruno Costacurta <techie@costacurta.org>
Date: Fri, 16 Mar 2012 20:13:05 +0100
Message-id: <[🔎] 20120316201305.Horde.E2_tKb5-3oNPY5DBS9kkx9A@webmail.costacurta.org>

'Operating System not found' is displayed once boot via GRUB command line.

[snip]

What's the output of bootinfoscript?

[snip]

So I ran boot_info_script.sh.

Which returns the following (snipped to mainly show /dev/sda4 on whichDebian is installed) :



Boot Info Script 0.60    from 17 May 2011

============================= Boot Info Summary:===============================


 => Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector
    946507840 of the same hard drive for core.img. core.img is at this
    location and looks for  on this drive.

sda1:__________________________________________________________________________


    File system:       vfat
    Boot sector type:  Grub2 (v1.99)
    Boot sector info:   Grub2 (v1.99) is installed in the boot sector of sda1
                       and looks at sector 932584136 of the same hard drive
                       for core.img. core.img is at this location and looks
                       for  on this drive. According to the info in the boot
                       sector, sda1 has 0 sectors.
    Operating System:
    Boot files:

[snip]

sda4:__________________________________________________________________________


    File system:       ext4
    Boot sector type:  -
    Boot sector info:
    Operating System:  Debian GNU/Linux 6.0
    Boot files:        /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img
[snip]

=========================== sda4/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 $prefix/grubenv ]; then
  load_env
fi
set default="0"
if [ "${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
}

function load_video {
  insmod vbe
  insmod vga
  insmod video_bochs
  insmod video_cirrus
}

insmod part_gpt
insmod ext2
set root='(hd0,gpt4)'
search --no-floppy --fs-uuid --set b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc
if loadfont /usr/share/grub/unicode.pf2 ; then
  set gfxmode=640x480
  load_video
  insmod gfxterm
fi
terminal_output gfxterm
insmod part_gpt
insmod ext2
set root='(hd0,gpt4)'
search --no-floppy --fs-uuid --set b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc
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/05_debian_theme ###
set menu_color_normal=cyan/blue
set menu_color_highlight=white/blue
### END /etc/grub.d/05_debian_theme ###

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

menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-amd64' --class debian--class gnu-linux --class gnu --class os {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt4)'

search --no-floppy --fs-uuid --setb6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc

        echo    'Loading Linux 2.6.32-5-amd64 ...'

linux /boot/vmlinuz-2.6.32-5-amd64root=UUID=b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc ro quiet

        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-2.6.32-5-amd64
}

menuentry 'Debian GNU/Linux, with Linux 2.6.32-5-amd64 (recoverymode)' --class debian --class gnu-linux --class gnu --class os {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt4)'

search --no-floppy --fs-uuid --setb6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc

        echo    'Loading Linux 2.6.32-5-amd64 ...'

linux /boot/vmlinuz-2.6.32-5-amd64root=UUID=b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc ro single

        echo    'Loading initial ramdisk ...'
        initrd  /boot/initrd.img-2.6.32-5-amd64
}
### 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 "Ubuntu, with Linux 3.0.0-16-generic (on /dev/sda2)" {
        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-16-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro acpi=off splashvt.handoff=7

        initrd /boot/initrd.img-3.0.0-16-generic
}

menuentry "Ubuntu, with Linux 3.0.0-16-generic (recovery mode) (on/dev/sda2)" {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-16-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro recovery nomodesetacpi=off

        initrd /boot/initrd.img-3.0.0-16-generic
}
menuentry "Ubuntu, with Linux 3.0.0-15-generic (on /dev/sda2)" {
        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-15-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro acpi=off splashvt.handoff=7

        initrd /boot/initrd.img-3.0.0-15-generic
}

menuentry "Ubuntu, with Linux 3.0.0-15-generic (recovery mode) (on/dev/sda2)" {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-15-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro recovery nomodesetacpi=off

        initrd /boot/initrd.img-3.0.0-15-generic
}
menuentry "Ubuntu, with Linux 3.0.0-14-generic (on /dev/sda2)" {
        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-14-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro acpi=off splashvt.handoff=7

        initrd /boot/initrd.img-3.0.0-14-generic

}

menuentry "Ubuntu, with Linux 3.0.0-14-generic (recovery mode) (on/dev/sda2)" {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-14-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro recovery nomodesetacpi=off

        initrd /boot/initrd.img-3.0.0-14-generic
}
menuentry "Ubuntu, with Linux 3.0.0-13-generic (on /dev/sda2)" {
        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-13-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro acpi=off splashvt.handoff=7

        initrd /boot/initrd.img-3.0.0-13-generic
}

menuentry "Ubuntu, with Linux 3.0.0-13-generic (recovery mode) (on/dev/sda2)" {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-13-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro recovery nomodesetacpi=off

        initrd /boot/initrd.img-3.0.0-13-generic
}
menuentry "Ubuntu, with Linux 3.0.0-12-generic (on /dev/sda2)" {
        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-12-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro acpi=off splashvt.handoff=7

        initrd /boot/initrd.img-3.0.0-12-generic
}

menuentry "Ubuntu, with Linux 3.0.0-12-generic (recovery mode) (on/dev/sda2)" {

        insmod part_gpt
        insmod ext2
        set root='(hd0,gpt2)'

search --no-floppy --fs-uuid --set1f2cac6a-301f-48f7-a83e-70485ad3a653linux /boot/vmlinuz-3.0.0-12-genericroot=UUID=1f2cac6a-301f-48f7-a83e-70485ad3a653 ro recovery nomodesetacpi=off

        initrd /boot/initrd.img-3.0.0-12-generic
}
### 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 ###
--------------------------------------------------------------------------------

=============================== sda4/etc/fstab:================================


--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
proc            /proc           proc    defaults        0       0
# / was on /dev/sda4 during installation

UUID=b6ebc0b2-59cc-4ceb-81ba-c60d90be2fdc / ext4errors=remount-ro 0 1

# swap was on /dev/sda3 during installation

UUID=cc3d3f3f-d38e-4741-adc1-7807282fdc16 none swap sw0 0

/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto     0       0
--------------------------------------------------------------------------------

=================== sda4: Location of files loaded by Grub:====================

GiB - GB FileFragment(s)

442.020458221 = 474.615853056 boot/grub/core.img1450.046794891 = 483.234066432 boot/grub/grub.cfg2442.517547607 = 475.149598720 boot/initrd.img-2.6.32-5-amd641442.415344238 = 475.039858688 boot/vmlinuz-2.6.32-5-amd641442.517547607 = 475.149598720 initrd.img1442.415344238 = 475.039858688 vmlinuz1


[snip]


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