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Old 03-24-2011, 01:20 PM   #1
begolf
LQ Newbie
 
Registered: Mar 2011
Posts: 2

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Ubuntu grub failure


This question is similar to others I have read like:
http://www.linuxquestions.org/questi...-error-869673/

I have read posts to run the boot_info_script and have done so, the results.text are below.

I am running the Ubuntu 9.10 Server edition, it was running for several months and my fear is that I took a spike through the ups or something strange. The machine will boot using the live CD and I ran the update-grub to attempt to fix but I still receive :

GRUB loading.
error: unknown filesystem
grub rescue>

any help is appreciated.

Here is the text from the RESULTS.txt
Code:
                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 #5 for /grub.

sda1: _________________________________________________________________________

    File system:       LVM2_member
    Boot sector type:  -
    Boot sector info:  

sda2: _________________________________________________________________________

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

sda5: _________________________________________________________________________

    File system:       ext2
    Boot sector type:  Unknown
    Boot sector info:  
    Operating System:  
    Boot files/dirs:   

dopey-root: _________________________________________________________________________

    File system:       ext4
    Boot sector type:  -
    Boot sector info:  
    Operating System:  Ubuntu 9.10
    Boot files/dirs:   /etc/fstab

dopey-swap_1: _________________________________________________________________________

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

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

Drive: sda ___________________ _____________________________________________________

Disk /dev/sda: 80.0 GB, 80026361856 bytes
255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors
Units = sectors of 1 * 512 = 512 bytes
Disk identifier: 0x9c879c87

Partition  Boot         Start           End          Size  Id System

/dev/sda1    *             63   155,798,369   155,798,307  8e Linux LVM
/dev/sda2         155,798,370   156,296,384       498,015   5 Extended
/dev/sda5         155,798,433   156,296,384       497,952  83 Linux


blkid -c /dev/null: ____________________________________________________________

Device           UUID                                   TYPE       LABEL                         

/dev/mapper/dopey-root 1ab4acbc-3a49-4e2e-801c-aa5e4d3879c3   ext4                                     
/dev/mapper/dopey-swap_1 cd923882-f79c-414a-b3f3-b28f526ca0e0   swap                                     
/dev/sda1        eSticb-4CIw-FSoA-mZkQ-Om2x-8qBB-Hz1PW5 LVM2_member                               
/dev/sda5        62e75da5-3e7f-4e4c-930c-e85301e34592   ext2                                     

=============================== "ls -R /dev/mapper/" output: ===============================
/dev/mapper:
control
dopey-root
dopey-swap_1

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

Device           Mount_Point              Type       Options

/dev/mapper/dopey-root /                        ext4       (rw,errors=remount-ro)
/dev/sda5        /boot                    ext2       (rw)


============================ dopey-root/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    defaults        0       0
/dev/mapper/dopey-root /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda5 during installation
UUID=62e75da5-3e7f-4e4c-930c-e85301e34592 /boot           ext2    defaults        0       2
/dev/mapper/dopey-swap_1 none            swap    sw              0       0
/dev/scd0       /media/cdrom0   udf,iso9660 user,noauto,exec,utf8 0       0
/dev/fd0        /media/floppy0  auto    rw,user,noauto,exec,utf8 0       0
=========================== Unknown MBRs/Boot Sectors/etc =======================

Unknown BootLoader  on sda5

00000000  bf ff 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000010  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
00000020  9b a4 08 00 c0 46 0c 00  83 83 02 01 6b 88 08 00  |.....F......k...|
00000030  c0 46 0c 00 87 89 02 01  31 a7 08 00 c0 46 0c 00  |.F......1....F..|
00000040  8f 8f 02 01 81 a7 08 00  c0 46 0c 00 95 95 02 01  |.........F......|
00000050  f7 a5 08 00 c0 46 0c 00  9a 9a 02 01 68 a1 08 00  |.....F......h...|
00000060  c0 46 0c 00 9c 9c 02 01  86 81 08 00 c0 46 0c 00  |.F...........F..|
00000070  a5 a5 02 01 13 8c 08 00  c0 46 0c 00 b4 b6 02 01  |.........F......|
00000080  9c a3 08 00 c0 46 0c 00  b8 b8 02 01 00 00 00 00  |.....F..........|
00000090  20 72 0d 00 b9 ff 00 00  00 00 00 00 00 00 00 00  | r..............|
000000a0  c8 8d 08 00 c0 46 0c 00  82 82 02 01 02 95 08 00  |.....F..........|
000000b0  c0 46 0c 00 86 86 02 01  f2 9b 08 00 c0 46 0c 00  |.F...........F..|
000000c0  89 89 02 01 44 9f 08 00  c0 46 0c 00 8b 8b 02 01  |....D....F......|
000000d0  a4 9f 08 00 c0 46 0c 00  8d 8d 02 01 01 97 08 00  |.....F..........|
000000e0  c0 46 0c 00 91 92 02 01  91 a7 08 00 c0 46 0c 00  |.F...........F..|
000000f0  96 96 02 01 25 9d 08 00  c0 46 0c 00 99 9a 02 01  |....%....F......|
00000100  85 a6 08 00 c0 46 0c 00  9c 9c 02 01 95 94 08 00  |.....F..........|
00000110  c0 46 0c 00 9e 9f 02 01  2e a3 08 00 c0 46 0c 00  |.F...........F..|
00000120  a1 a1 02 01 41 97 08 00  c0 46 0c 00 a3 a4 02 01  |....A....F......|
00000130  ef 88 08 00 c0 46 0c 00  a6 a8 02 01 2b 85 08 00  |.....F......+...|
00000140  c0 46 0c 00 aa ad 02 01  1c 22 08 00 c0 46 0c 00  |.F......."...F..|
00000150  bb bb 02 01 00 00 00 00  a0 72 0d 00 bc ff 00 00  |.........r......|
00000160  00 00 00 00 c0 78 0d 00  b8 b8 00 02 00 00 00 00  |.....x..........|
00000170  20 78 0d 00 b9 b9 00 02  00 00 00 00 40 77 0d 00  | x..........@w..|
00000180  ba ba 00 02 00 00 00 00  80 76 0d 00 bb bb 00 02  |.........v......|
00000190  00 00 00 00 00 76 0d 00  bc bc 00 02 00 00 00 00  |.....v..........|
000001a0  60 75 0d 00 bd bd 00 02  00 00 00 00 a0 74 0d 00  |`u...........t..|
000001b0  be be 00 02 00 00 00 00  e0 73 0d 00 bf bf 00 02  |.........s......|
000001c0  00 00 00 00 60 73 0d 00  c0 ff 00 00 00 00 00 00  |....`s..........|
000001d0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|
000001e0  b9 88 08 00 c0 46 0c 00  82 84 02 01 65 99 08 00  |.....F......e...|
000001f0  c0 46 0c 00 89 8a 02 01  74 90 08 00 c0 46 0c 00  |.F......t....F..|
00000200
 
Old 03-24-2011, 08:45 PM   #2
yancek
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Registered: Apr 2008
Distribution: Slackware, Ubuntu, PCLinux,
Posts: 10,446

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Quote:
Unknown BootLoader on sda5
Based on the above output in your boot_info_script, I would suggest you re-install Grub2 from your Ubuntu Live CD.
Check this link for how:

https://help.ubuntu.com/community/Gr...0from%20LiveCD
 
Old 03-25-2011, 06:43 AM   #3
michaelk
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Are you able to mount /sda5 from the live CD?
Make sure sda5 is not mounted check its file system by running fsck from the live CD.
 
Old 04-02-2011, 06:23 AM   #4
begolf
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Registered: Mar 2011
Posts: 2

Original Poster
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Thanks for the help, the disk has some bad sectors that are preventing me to access it. I found this post http://www.webupd8.org/2010/02/how-t...n-damaged.html and am currently working through it to create the iso and possibly grab the data.
 
  


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