grub error: unknown filesystem after upgrade to 11.04

[endintears]

Hi all,

I tried upgrading to 11.04 this morning and after rebooting grub left me at the grub rescue> prompt with the message 'error: unknown filesystem'.

I've tried purging and reinstalling grub using a live-cd but no joy.

Let me know what additional information to provide.

EDIT: Here is the output from the Boot Info Script


Boot Info Script 0.55 dated February 15th, 2010

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

=> Grub 2 is installed in the MBR of /dev/sda and looks on the same drive in
partition #6 for cbdc4.
=> Grub 2 is installed in the MBR of /dev/sdb and looks on the same drive in
partition #6 for cbdc4.
=> Windows is installed in the MBR of /dev/sdc
=> Grub 2 is installed in the MBR of /dev/sdd and looks for b2can.

sda1: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs:

sdb1: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files/dirs:

sdb2: __________________________________________________ _______________________

File system: Extended Partition
Boot sector type: -
Boot sector info:

sdb5: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sdb5 starts
at sector 63.
Operating System:
Boot files/dirs:

sdc1: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files/dirs:

sdd1: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files/dirs: /boot.ini /ntldr /NTDETECT.COM

sdd2: __________________________________________________ _______________________

File system: Extended Partition
Boot sector type: -
Boot sector info:

sdd5: __________________________________________________ _______________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sdd5 starts
at sector 63.
Operating System:
Boot files/dirs:

sdd6: __________________________________________________ _______________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 11.04
Boot files/dirs: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sdd7: __________________________________________________ _______________________

File system: swap
Boot sector type: -
Boot sector info:

=========================== Drive/Partition Info: =============================

Drive: sda ___________________ __________________________________________________ ___

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sda1 63 1,953,520,064 1,953,520,002 7 HPFS/NTFS


Drive: sdb ___________________ __________________________________________________ ___

Disk /dev/sdb: 300.1 GB, 300090728448 bytes
255 heads, 63 sectors/track, 36483 cylinders, total 586114704 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sdb1 * 63 204,796,619 204,796,557 7 HPFS/NTFS
/dev/sdb2 204,796,620 586,083,329 381,286,710 f W95 Ext d (LBA)
/dev/sdb5 204,796,683 586,083,329 381,286,647 7 HPFS/NTFS


Drive: sdc ___________________ __________________________________________________ ___

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sdc1 63 1,953,520,064 1,953,520,002 7 HPFS/NTFS


Drive: sdd ___________________ __________________________________________________ ___

Disk /dev/sdd: 1000.2 GB, 1000215724032 bytes
255 heads, 63 sectors/track, 121602 cylinders, total 1953546336 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start End Size Id System

/dev/sdd1 * 63 102,398,309 102,398,247 7 HPFS/NTFS
/dev/sdd2 102,398,371 1,953,546,239 1,851,147,869 f W95 Ext d (LBA)
/dev/sdd5 102,398,373 687,906,292 585,507,920 7 HPFS/NTFS
/dev/sdd6 687,906,816 1,941,469,183 1,253,562,368 83 Linux
/dev/sdd7 1,941,471,232 1,953,546,239 12,075,008 82 Linux swap / Solaris


blkid -c /dev/null: __________________________________________________ __________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 9638717038714FEB ntfs TV
/dev/sda: PTTYPE="dos"
/dev/sdb1 30902D2C902CF9CC ntfs
/dev/sdb2: PTTYPE="dos"
/dev/sdb5 A820C8C120C897A8 ntfs
/dev/sdb: PTTYPE="dos"
/dev/sdc1 8638549738548857 ntfs Backup
/dev/sdc: PTTYPE="dos"
/dev/sdd1 84D0C477D0C4714A ntfs System
/dev/sdd2: PTTYPE="dos"
/dev/sdd5 ECB61007B60FD14E ntfs Data
/dev/sdd6 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ext4
/dev/sdd7 7262bb4e-a300-48a9-b9b3-5d8982d54760 swap
/dev/sdd: PTTYPE="dos"

============================ "mount | grep ^/dev output: ===========================

Device Mount_Point Type Options

aufs / aufs (rw)
/dev/sr0 /cdrom iso9660 (ro,noatime)
/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sdd6 /media/8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ext4 (rw,nosuid,nodev,uhelper=udisks)


================================ sdd1/boot.ini: ================================

[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect /3GB

=========================== sdd6/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 $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${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 recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

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

insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
set locale_dir=($root)/boot/grub/locale
set lang=en_US
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux /boot/vmlinuz-2.6.38-8-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-2.6.38-8-generic
}
menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
echo 'Loading Linux 2.6.38-8-generic ...'
linux /boot/vmlinuz-2.6.38-8-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.38-8-generic
}
submenu "Previous Linux versions" {
menuentry 'Ubuntu, with Linux 2.6.35-28-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux /boot/vmlinuz-2.6.35-28-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-2.6.35-28-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-28-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
echo 'Loading Linux 2.6.35-28-generic ...'
linux /boot/vmlinuz-2.6.35-28-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-28-generic
}
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(/dev/sdd,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
menuentry "Microsoft Windows XP Professional (on /dev/sdd1)" --class windows --class os {
insmod part_msdos
insmod ntfs
set root='(/dev/sdd,msdos1)'
search --no-floppy --fs-uuid --set=root 84D0C477D0C4714A
drivemap -s (hd0) ${root}
chainloader +1
}
### 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 ###

=============================== sdd6/etc/fstab: ===============================

# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' 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 nodev,noexec,nosuid 0 0
# / was on /dev/sdd6 during installation
UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 / ext4 errors=remount-ro 0 1
# swap was on /dev/sdd7 during installation
UUID=7262bb4e-a300-48a9-b9b3-5d8982d54760 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0

=================== sdd6: Location of files loaded by Grub: ===================


500.5GB: boot/grub/core.img
500.5GB: boot/grub/grub.cfg
764.5GB: boot/initrd.img-2.6.35-28-generic
766.5GB: boot/initrd.img-2.6.38-8-generic
399.9GB: boot/vmlinuz-2.6.35-28-generic
764.6GB: boot/vmlinuz-2.6.38-8-generic
766.5GB: initrd.img
764.5GB: initrd.img.old
764.6GB: vmlinuz
399.9GB: vmlinuz.old

[endintears]

Here's the output from the more up to date BIS:


Boot Info Script 0.56 from 8 February 2011


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

=> Grub2 (v1.99) is installed in the MBR of /dev/sda and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and uses an
embedded config file:

---------------------------------------------------------------------------
-----
search.fs_uuid 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 root
set
prefix=($root)/boot/grub---------------------------------------------------
-----------------------------.
=> Grub2 (v1.99) is installed in the MBR of /dev/sdb and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and uses an
embedded config file:

---------------------------------------------------------------------------
-----
search.fs_uuid 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 root
set
prefix=($root)/boot/grub---------------------------------------------------
-----------------------------.
=> Windows is installed in the MBR of /dev/sdc.
=> Grub2 (v1.99) is installed in the MBR of /dev/sdd and looks at sector 1 of
the same hard drive for core.img. core.img is at this location and looks
for (,msdos6)/boot/grub on this drive.

sda1: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sdb1: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files:

sdb2: __________________________________________________ ________________________

File system: Extended Partition
Boot sector type: -
Boot sector info:

sdb5: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sdb5 starts
at sector 63.
Operating System:
Boot files:

sdc1: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sdd1: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files: /boot.ini /ntldr /NTDETECT.COM

sdd2: __________________________________________________ ________________________

File system: Extended Partition
Boot sector type: -
Boot sector info:

sdd5: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sdd5 starts
at sector 63.
Operating System:
Boot files:

sdd6: __________________________________________________ ________________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 11.04
Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sdd7: __________________________________________________ ________________________

File system: swap
Boot sector type: -
Boot sector info:

============================ Drive/Partition Info: =============================

Drive: sda __________________________________________________ ___________________

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sda1 63 1,953,520,064 1,953,520,002 7 NTFS / exFAT / HPFS


Drive: sdb __________________________________________________ ___________________

Disk /dev/sdb: 300.1 GB, 300090728448 bytes
255 heads, 63 sectors/track, 36483 cylinders, total 586114704 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sdb1 * 63 204,796,619 204,796,557 7 NTFS / exFAT / HPFS
/dev/sdb2 204,796,620 586,083,329 381,286,710 f W95 Extended (LBA)
/dev/sdb5 204,796,683 586,083,329 381,286,647 7 NTFS / exFAT / HPFS


Drive: sdc __________________________________________________ ___________________

Disk /dev/sdc: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sdc1 63 1,953,520,064 1,953,520,002 7 NTFS / exFAT / HPFS


Drive: sdd __________________________________________________ ___________________

Disk /dev/sdd: 1000.2 GB, 1000215724032 bytes
255 heads, 63 sectors/track, 121602 cylinders, total 1953546336 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes

Partition Boot Start Sector End Sector # of Sectors Id System

/dev/sdd1 * 63 102,398,309 102,398,247 7 NTFS / exFAT / HPFS
/dev/sdd2 102,398,371 1,953,546,239 1,851,147,869 f W95 Extended (LBA)
/dev/sdd5 102,398,373 687,906,292 585,507,920 7 NTFS / exFAT / HPFS
/dev/sdd6 687,906,816 1,941,469,183 1,253,562,368 83 Linux
/dev/sdd7 1,941,471,232 1,953,546,239 12,075,008 82 Linux swap / Solaris


"blkid" output: __________________________________________________ ______________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 9638717038714FEB ntfs TV
/dev/sdb1 30902D2C902CF9CC ntfs
/dev/sdb5 A820C8C120C897A8 ntfs
/dev/sdc1 8638549738548857 ntfs Backup
/dev/sdd1 84D0C477D0C4714A ntfs System
/dev/sdd5 ECB61007B60FD14E ntfs Data
/dev/sdd6 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ext4
/dev/sdd7 7262bb4e-a300-48a9-b9b3-5d8982d54760 swap

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sdd6 /mnt ext4 (rw)
/dev/sr0 /cdrom iso9660 (ro,noatime)


================================ sdd1/boot.ini: ================================

--------------------------------------------------------------------------------
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(1)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect /3GB
--------------------------------------------------------------------------------

=========================== sdd6/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 $prefix/grubenv ]; then
set have_grubenv=true
load_env
fi
set default="0"
if [ "${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 recordfail {
set recordfail=1
if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
}

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

insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_output gfxterm
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
set locale_dir=($root)/boot/grub/locale
set lang=en_US
insmod gettext
if [ "${recordfail}" = 1 ]; then
set timeout=-1
else
set timeout=10
fi
### END /etc/grub.d/00_header ###

### BEGIN /etc/grub.d/05_debian_theme ###
set menu_color_normal=white/black
set menu_color_highlight=black/light-gray
if background_color 44,0,30; then
clear
fi
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
if [ ${recordfail} != 1 ]; then
if [ -e ${prefix}/gfxblacklist.txt ]; then
if hwmatch ${prefix}/gfxblacklist.txt 3; then
if [ ${match} = 0 ]; then
set linux_gfx_mode=keep
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=text
fi
else
set linux_gfx_mode=keep
fi
else
set linux_gfx_mode=text
fi
export linux_gfx_mode
if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
menuentry 'Ubuntu, with Linux 2.6.38-8-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux /boot/vmlinuz-2.6.38-8-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-2.6.38-8-generic
}
menuentry 'Ubuntu, with Linux 2.6.38-8-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
echo 'Loading Linux 2.6.38-8-generic ...'
linux /boot/vmlinuz-2.6.38-8-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.38-8-generic
}
submenu "Previous Linux versions" {
menuentry 'Ubuntu, with Linux 2.6.35-28-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux /boot/vmlinuz-2.6.35-28-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro quiet splash vt.handoff=7
initrd /boot/initrd.img-2.6.35-28-generic
}
menuentry 'Ubuntu, with Linux 2.6.35-28-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
set gfxpayload=$linux_gfx_mode
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
echo 'Loading Linux 2.6.35-28-generic ...'
linux /boot/vmlinuz-2.6.35-28-generic root=UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.35-28-generic
}
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod part_msdos
insmod ext2
set root='(hd0,msdos6)'
search --no-floppy --fs-uuid --set=root 8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8
linux16 /boot/memtest86+.bin console=ttyS0,115200n8
}
### END /etc/grub.d/20_memtest86+ ###

### BEGIN /etc/grub.d/30_os-prober ###
if [ "x${timeout}" != "x-1" ]; then
if keystatus; then
if keystatus --shift; then
set timeout=-1
else
set timeout=0
fi
else
if sleep --interruptible 3 ; then
set timeout=0
fi
fi
fi
### 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 ###
--------------------------------------------------------------------------------

=============================== sdd6/etc/fstab: ================================

--------------------------------------------------------------------------------
# /etc/fstab: static file system information.
#
# Use 'blkid -o value -s UUID' 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 nodev,noexec,nosuid 0 0
# / was on /dev/sdd6 during installation
UUID=8ccc99da-e4ef-4db3-a8d0-e5e74e9bb3b8 / ext4 errors=remount-ro 0 1
# swap was on /dev/sdd7 during installation
UUID=7262bb4e-a300-48a9-b9b3-5d8982d54760 none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
--------------------------------------------------------------------------------

=================== sdd6: Location of files loaded by Grub: ====================

GiB - GB File Fragment(s)

466.164344788 = 500.540153856 boot/grub/core.img 1
466.167980194 = 500.544057344 boot/grub/grub.cfg 1
712.069732666 = 764.579053568 boot/initrd.img-2.6.35-28-generic 2
713.898643494 = 766.542831616 boot/initrd.img-2.6.38-8-generic 2
372.472446442 = 399.939244032 boot/vmlinuz-2.6.35-28-generic 1
712.160461426 = 764.676472832 boot/vmlinuz-2.6.38-8-generic 1
713.898643494 = 766.542831616 initrd.img 2
712.069732666 = 764.579053568 initrd.img.old 2
712.160461426 = 764.676472832 vmlinuz 1
372.472446442 = 399.939244032 vmlinuz.old 1

=============================== StdErr Messages: ===============================

unlzma: Decoder error
unlzma: Decoder error
unlzma: Decoder error

[kansasnoob]

Please also post the output of:


sudo parted -l

BTW that's a lower case L :)

[endintears]

As requested:


ubuntu@ubuntu:~$ sudo parted -l
Model: ATA ST31000528AS (scsi)
Disk /dev/sda: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 1000GB 1000GB primary ntfs


Model: ATA Maxtor 6B300S0 (scsi)
Disk /dev/sdb: 300GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 105GB 105GB primary ntfs boot
2 105GB 300GB 195GB extended lba
5 105GB 300GB 195GB logical ntfs


Model: ATA ST31000528AS (scsi)
Disk /dev/sdc: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 1000GB 1000GB primary ntfs


Model: ATA NetCell SyncRAID (scsi)
Disk /dev/sdd: 1000GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos

Number Start End Size Type File system Flags
1 32.3kB 52.4GB 52.4GB primary ntfs boot
2 52.4GB 1000GB 948GB extended lba
5 52.4GB 352GB 300GB logical ntfs
6 352GB 994GB 642GB logical ext4
7 994GB 1000GB 6182MB logical linux-swap(v1)


Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0
has been opened read-only.
Error: /dev/sr0: unrecognised disk label

Warning: Unable to open /dev/fd0 read-write (Read-only file system). /dev/fd0
has been opened read-only.

[kansasnoob]

OK, based on your error and the fact that grub is already installed in sda, sdb, and sdc let's do this, from a live CD/USB (please copy-n-paste):


sudo mount /dev/sdd6 /mnt && sudo mount --bind /dev /mnt/dev && sudo mount --bind /proc /mnt/proc && sudo mount --bind /sys /mnt/sys && sudo mount --bind /dev/pts /mnt/dev/pts && sudo cp /etc/resolv.conf /mnt/etc/resolv.conf && sudo chroot /mnt


apt-get install --reinstall grub-pc

That may trigger a process that presents a few debconf windows similar to this:

190819

Those windows are generally manipulated with the use of the Tab key, arrow keys, and to select/de-select "grub-install" devices you use the spacebar.

Remember you want to install grub to sda, sdb, and sdd.

Whether those appear or not let's play things safe and continue:


grub-install /dev/sda


grub-install /dev/sdb


grub-install /dev/sdd


update-grub


exit


sudo umount /mnt/dev/pts && sudo umount /mnt/sys && sudo umount /mnt/proc && sudo umount /mnt/dev && sudo umount /mnt

Don't worry if that last command spits any errors, just reboot and keep your fingers crossed :)

[endintears]

Thanks for the suggestions. Unfortunately the problem remains. Any other ideas?

[kansasnoob]

I do have a couple of ideas but I have to be out of the house for several hours (medical stuff). Regardless it would be much easier to work on this if we could get you booted into Ubuntu.

If it's not terribly inconvenient for you DL and burn this disc:

http://www.bootproblems.com/super-grub2-disk/

It's really not designed to fix anything but just to help boot unbootable OS's, and I'd prefer not fixing this with anything but Ubuntu's own grub anyway.

I've had very good luck with the Detect any OS option. Expect it to be slow, like maybe even a couple of minutes slow booting :)

Hopefully that can serve as a temporary solution so you can get some work done, and I'll get back ASAP.

My first thought is trying my "Deep and dirty grub2 purge & replace", but I call it that for a reason :)

Also I've noticed too many of these failures so we may have to try reverting to the Maverick 'grub-pc' and 'grub-common' packages :(

I've had no problem on my own machines but we need to try and figure out why there are so many boot failures.

[kansasnoob]

If someone else wants to see my "dirty" notes here they are, but they're sloppy and incomplete :(

190835

[endintears]

Thanks, much appreciated. Using the boot CD and 'Detect any OS' I've been able to successfully boot.

Let me know (when you have the time) your other ideas for a permanent solution but in the interim I'll take a look at your notes.

[kansasnoob]

Thanks, much appreciated. Using the boot CD and 'Detect any OS' I've been able to successfully boot.

Let me know (when you have the time) your other ideas for a permanent solution but in the interim I'll take a look at your notes.

Great! I know it's a PITA to have to use that to boot right now but I have a few non-puter things nipping at my heels :(

It could be either very late tonight or tomorrow morning before I can get back to this, so please accept my apologies :redface:

Just to give me a head start I'd like the output of these commands while booted into your installed Ubuntu:


ls /etc/grub.d


ls /etc/default


uname -m

I do know we can fix this :D

[endintears]

No apology necessary! Here is the output you requested:


$ ls /etc/grub.d
00_header 10_linux 20_memtest86+ 40_custom README
05_debian_theme 20_linux_xen 30_os-prober 41_custom


$ ls /etc/default
acpid console-setup halt ntpdate tmpfs
acpi-support cron irqbalance pulseaudio ufw
alsa cups kerneloops rcS useradd
apport dbus keyboard rsync virtualbox-ose
avahi-daemon devpts locale rsyslog winbind
bootlogd google-chrome mediatomb sabnzbdplus
brltty grub mumble-server saned
cacerts grub.ucf-dist nss speech-dispatcher


$ uname -m
i686

[kansasnoob]

Sorry to take so long but besides trying to get you fixed I'm trying to understand what might be wrong so we can truly get it fixed :)

Step #1: This is totally optional but it may help to figure out what's going wrong, not just for you, but with Maverick to Natty upgrades in general (regarding grub). But it could be time consuming so if you opt out of this it's OK.

If you're game to filing a bug report regarding this open a terminal and run:


ubuntu-bug grub-pc

If you have a Launchpad account you'll be asked to login, or you'll be asked to create an account. If you chose to do this I'd suggest a simple bug title like, "Upgrade to Natty renders computer unbootable". Ignore suggestions of being a duplicate and insist it's a new bug.

Then in the text explain very briefly what went wrong and what you've done to fix it, including a link to this thread. No need to get into great detail although it would be good if you could provide a link to the guide you followed when in post #1 you said:


I've tried purging and reinstalling grub using a live-cd but no joy.


Then if you post the bug report link I'll sign up and try to take care of things going forward as best I can. If you choose not to do this it's OK with me :D

I realize it can be just a further PITA so it's 100% optional and in no way effects the level of help you'll get from me.

Step #2: I have serious doubts that this will work based on what's happened so far but we really do need to try this. Please copy-n-paste:


sudo mv /boot/grub /boot/grub_OLD


sudo mkdir /boot/grub


sudo mv /etc/default/grub /etc/default/grub_OLD


sudo rm -R /etc/grub.d

Some of these commands will return a message like "not installed, so not removed" or "E: Unable to locate package", that's OK. You'll need to confirm removal of most packages by typing "y". (NOTE: It's also safe to reinstall 'grub-customizer', 'startupmanager', and 'ubuntu-tweak' after you know that grub 2 is restored and booting properly. But it is NOT safe to install the package 'grub'!) When you "purge grub-pc" you'll be asked if you're sure you want to remove all grub files so you'll have to confirm that by using the Tab key to select Yes.


sudo apt-get remove startupmanager


sudo apt-get remove grub-customizer


sudo apt-get remove ubuntu-tweak


sudo apt-get purge grub


sudo apt-get purge grub-pc


sudo apt-get purge grub-common

Reinstalling grub 2 would hopefully require only one command:


sudo apt-get install grub-pc

More debconf windows, just do as explained in post #5 :)

If we're lucky that will boot now, if not move on to step #3 after the requisite amount of cursing and once again using the SGD2 disc.

Step #3: If you're here step #2 failed so we're going to try downgrading to Maverick grub packages.

NOTE: these are 32 bit packages, I knew that's what was needed from the output of "uname -m", to others attempting this - ask for help first!


sudo rm -R /boot/grub


sudo mkdir /boot/grub


sudo rm -R /etc/default/grub


sudo rm -R /etc/grub.d


sudo apt-get purge grub-pc


sudo apt-get purge grub-common


wget http://mirrors.us.kernel.org/ubuntu//pool/main/g/grub2/grub-common_1.98+20100804-5ubuntu3_i386.deb


wget http://mirrors.us.kernel.org/ubuntu//pool/main/g/grub2/grub-pc_1.98+20100804-5ubuntu3_i386.deb


sudo dpkg -i grub-common_1.98+20100804-5ubuntu3_i386.deb


sudo dpkg -i grub-pc_1.98+20100804-5ubuntu3_i386.deb

Again more debconf windows. When complete reboot. If that works then you'll want to keep those packages from upgrading:


echo grub-common hold | sudo dpkg --set-selections


echo grub-pc hold | sudo dpkg --set-selections

I'm dying of curiosity to see what works. I won't say yet but I have a sneaking suspicion where things went wrong ........ maybe.

[endintears]

Just to let you know I have read this. I just need to try to find the time to dedicate to it, and I intend to fill out the bug report as well, it's the least I can do in return.

[endintears]

Bug report is here:

https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/778059

[endintears]

And to confirm that yes, downgrading to the Maverick grub packages fixed the problem!

[kansasnoob]

And to confirm that yes, downgrading to the Maverick grub packages fixed the problem!

But only running step #2 did not?

[kansasnoob]

Many thanks BTW :)

I'm lousy tired ATM, nursing a sick dog post surgery, so if I make little sense I'm sorry.

[endintears]

Yes, sorry, to clarify, running step #2 did not work, and I had to again use the SGD to boot.

[ais77]

Fresh installed Natty frozen at Grub menu after several reboots - with no response from keyboard. With no chances to boot.
Only downgrading to Maverick Grub solved the problem.
Thank you for HOWTO.