Help me on grub rescue

[rohhaan]

Help, I'm so out of my depth here!
I have a desktop with dual os windows XP and Ubuntu 10.04 on it.
I've been using them fine for the past year or so, today while i was trying to recover some deleted files with testdisk during the rebooting process suddenly power failed for few seconds.
Now when ever i switch it on i get message
error : no such partition
grub rescue >

Now all I can get (unless I boot from the CD) is a GRUB RESCUE prompt.

after running boot_loader_script.sh command i got following result.txt



Boot Info Script 0.60 from 17 May 2011


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

=> Grub2 (v1.97-1.98) 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
looks in partition 8 for /boot/grub.

sda1: __________________________________________________ ________________________

File system: vfat
Boot sector type: Windows XP: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files: /boot.ini /ntldr /NTDETECT.COM

sda2: __________________________________________________ ________________________

File system: vfat
Boot sector type: Unknown
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sda3: __________________________________________________ ________________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sda4: __________________________________________________ ________________________

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

sda5: __________________________________________________ ________________________

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

sda6: __________________________________________________ ________________________

File system: vfat
Boot sector type: Windows XP: FAT32
Boot sector info: According to the info in the boot sector, sda6 starts
at sector 63. But according to the info from fdisk,
sda6 starts at sector 37977723. "63" and "2048" are
quite common values for the starting sector of a
logical partition and they only need to be fixed when
you want to boot Windows from a logical partition.
Operating System:
Boot files:

sda7: __________________________________________________ ________________________

File system: vfat
Boot sector type: Windows XP: FAT32
Boot sector info: According to the info in the boot sector, sda7 starts
at sector 63. But according to the info from fdisk,
sda7 starts at sect]or 57448503. "63" and "2048" are
quite common values for the starting sector of a
logical partition and they only need to be fixed when
you want to boot Windows from a logical partition.
Operating System:
Boot files:

sdb: __________________________________________________ _________________________

File system: vfat
Boot sector type: -
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sdc: __________________________________________________ _________________________

File system: vfat
Boot sector type: -
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

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

Drive: sda __________________________________________________ ___________________

Disk /dev/sda: 40.1 GB, 40060403712 bytes
255 heads, 63 sectors/track, 4870 cylinders, total 78242976 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 18,506,879 18,506,817 c W95 FAT32 (LBA)
/dev/sda2 18,506,943 25,788,038 7,281,096 c W95 FAT32 (LBA)
/dev/sda3 25,788,416 37,343,231 11,554,816 83 Linux
/dev/sda4 37,343,250 78,252,614 40,909,365 f W95 Extended (LBA)
/dev/sda5 37,345,280 37,976,047 630,768 82 Linux swap / Solaris
/dev/sda6 37,977,723 57,448,439 19,470,717 c W95 FAT32 (LBA)
/dev/sda7 57,448,503 78,220,484 20,771,982 c W95 FAT32 (LBA)

/dev/sda4 ends after the last sector of /dev/sda

"blkid" output: __________________________________________________ ______________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/ramzswap0 swap
/dev/sda1 D468-8224 vfat
/dev/sda2 150A-3124 vfat
/dev/sda3 87091611-e9ba-4ff6-8030-b68b1f7498f5 ext4
/dev/sda5 b41ddd04-c5bd-4a88-ba76-bc04a25da13f swap
/dev/sda6 50CE-D7BC vfat
/dev/sda7 9422-2618 vfat ‰PNG
/dev/sdb DC63-0000 vfat
/dev/sdc 3F53-75BC vfat

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

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sda1 /media/D468-8224 vfat (rw,nosuid,nodev,uhelper=udisks,uid=999,gid=999,sh ortname=mixed,dmask=0077,utf8=1,flush)
/dev/sda2 /media/150A-3124 vfat (rw,nosuid,nodev,uhelper=udisks,uid=999,gid=999,sh ortname=mixed,dmask=0077,utf8=1,flush)
/dev/sda3 /media/87091611-e9ba-4ff6-8030-b68b1f7498f5 ext4 (rw,nosuid,nodev,uhelper=udisks)
/dev/sdb /media/DC63-0000 vfat (rw,nosuid,nodev,uhelper=udisks,uid=999,gid=999,sh ortname=mixed,dmask=0077,utf8=1,flush)
/dev/sdc /media/3F53-75BC vfat (rw,nosuid,nodev,uhelper=udisks,uid=999,gid=999,sh ortname=mixed,dmask=0077,utf8=1,flush)
/dev/sr0 /cdrom iso9660 (ro,noatime)


================================ sda1/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
--------------------------------------------------------------------------------

=========================== sda3/boot/grub/grub.cfg: ===========================

--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/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 recordfail {
set recordfail=1
if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
set locale_dir=($root)/boot/grub/locale
set lang=en
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
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=87091611-e9ba-4ff6-8030-b68b1f7498f5 ro quiet splash
initrd /boot/initrd.img-2.6.32-21-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
echo 'Loading Linux 2.6.32-21-generic ...'
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=87091611-e9ba-4ff6-8030-b68b1f7498f5 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-21-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
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/sda1)" {
insmod fat
set root='(hd0,1)'
search --no-floppy --fs-uuid --set d468-8224
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 ###
--------------------------------------------------------------------------------

=============================== sda3/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/sda8 during installation
UUID=87091611-e9ba-4ff6-8030-b68b1f7498f5 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda9 during installation
UUID=b41ddd04-c5bd-4a88-ba76-bc04a25da13f none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
--------------------------------------------------------------------------------

=================== sda3: Location of files loaded by Grub: ====================

GiB - GB File Fragment(s)

15.032760620 = 16.141303808 boot/grub/core.img 1
16.947658539 = 18.197409792 boot/grub/grub.cfg 1
16.240234375 = 17.437818880 boot/initrd.img-2.6.32-21-generic 2
15.769378662 = 16.932241408 boot/vmlinuz-2.6.32-21-generic 1
16.240234375 = 17.437818880 initrd.img 2
15.769378662 = 16.932241408 vmlinuz 1

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown BootLoader on sda2

00000000 eb 5a 90 4d 53 57 49 4e 34 2e 31 00 02 10 2a 00 |.Z.MSWIN4.1...*.|
00000010 02 00 00 00 00 f8 00 00 3f 00 ff 00 bf 64 1a 01 |........?....d..|
00000020 c8 19 6f 00 e2 0d 00 00 00 00 00 00 02 00 00 00 |..o.............|
00000030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000040 80 00 29 24 31 0a 15 4e 4f 20 4e 41 4d 45 20 20 |..)$1..NO NAME |
00000050 20 20 46 41 54 33 32 20 20 20 f1 7d fa 33 c9 8e | FAT32 .}.3..|
00000060 d1 bc f8 7b 8e c1 bd 78 00 c5 76 00 1e 56 16 55 |...{...x..v..V.U|
00000070 bf 22 05 89 7e 00 89 4e 02 b1 0b fc f3 a4 8e d9 |."..~..N........|
00000080 bd 00 7c c6 45 fe 0f 8b 46 18 88 45 f9 fb 38 66 |..|.E...F..E..8f|
00000090 40 7c 04 cd 13 72 4e bf 02 00 83 7e 16 00 75 71 |@|...rN....~..uq|
000000a0 66 83 7e 24 00 74 6a 8b 46 1c 8b 56 1e b9 03 00 |f.~$.tj.F..V....|
000000b0 49 40 75 01 42 bb 00 7e e8 90 00 73 2a b0 f8 4f |I@u.B..~...s*..O|
000000c0 74 21 8b 46 32 33 d2 b9 03 00 3b c8 77 43 8b 76 |t!.F23....;.wC.v|
000000d0 0e 3b ce 73 3c 2b f1 3b c6 77 36 03 46 1c 13 56 |.;.s<+.;.w6.F..V|
000000e0 1e eb cd 73 2c eb 49 66 81 be 00 02 52 52 61 41 |...s,.If....RRaA|
000000f0 75 cc 66 81 be fc 03 00 00 55 aa 75 c1 66 81 be |u.f......U.u.f..|
00000100 fc 05 00 00 55 aa 75 b6 83 7e 2a 00 77 03 e9 ef |....U.u..~*.w...|
00000110 02 be 80 7d fb ac 98 03 f0 ac 84 c0 74 17 3c ff |...}........t.<.|
00000120 74 09 b4 0e bb 07 00 cd 10 eb ee be 83 7d eb e4 |t............}..|
00000130 be 81 7d eb df 33 c0 cd 16 5e 1f 8f 04 8f 44 02 |..}..3...^....D.|
00000140 cd 19 00 00 00 00 00 00 00 00 00 50 52 51 91 92 |...........PRQ..|
00000150 33 d2 f7 76 18 91 f7 76 18 42 87 ca f7 76 1a 8a |3..v...v.B...v..|
00000160 f2 8a 56 40 8a e8 d0 cc d0 cc 0a cc b8 01 02 cd |..V@............|
00000170 13 59 5a 58 72 09 40 75 01 42 03 5e 0b e2 cc c3 |.YZXr.@u.B.^....|
00000180 03 18 01 27 0d 0a 49 6e 76 61 6c 69 64 20 73 79 |...'..Invalid sy|
00000190 73 74 65 6d 20 64 69 73 6b ff 0d 0a 44 69 73 6b |stem disk...Disk|
000001a0 20 49 2f 4f 20 65 72 72 6f 72 ff 0d 0a 52 65 70 | I/O error...Rep|
000001b0 6c 61 63 65 20 74 68 65 20 64 69 73 6b 2c 20 61 |lace the disk, a|
000001c0 6e 64 20 74 68 65 6e 20 70 72 65 73 73 20 61 6e |nd then press an|
000001d0 79 20 6b 65 79 0d 0a 00 49 4f 20 20 20 20 20 20 |y key...IO |
000001e0 53 59 53 4d 53 44 4f 53 20 20 20 53 59 53 80 01 |SYSMSDOS SYS..|
000001f0 00 57 49 4e 42 4f 4f 54 20 53 59 53 00 00 55 aa |.WINBOOT SYS..U.|
00000200

Unknown BootLoader on sda4

00000000 b8 b4 ed ed cd 35 05 4f 79 56 6e 1a d8 59 92 e7 |.....5.OyVn..Y..|
00000010 93 ef dc e9 d4 e1 8e e7 57 86 8b 35 69 51 40 29 |........W..5iQ@)|
00000020 a5 f5 7d c6 6a ee d5 a9 ad 9a 3d aa 90 80 1d 0b |..}.j.....=.....|
00000030 aa 7c 5f ee e6 ce 55 e2 28 75 cf ef 8a ac 53 d1 |.|_...U.(u....S.|
00000040 b6 21 a7 98 f9 80 84 39 a0 be b8 53 79 f1 f2 2f |.!.....9...Sy../|
00000050 12 74 31 6c 03 9f ae c5 02 ea 34 4f bc 76 46 80 |.t1l......4O.vF.|
00000060 5b 28 79 49 88 a9 04 44 ba e2 19 bf 08 4e ba 82 |[(yI...D.....N..|
00000070 96 b3 1e 9c c7 61 56 6d cb 5d 27 cc 68 a4 68 dc |.....aVm.]'.h.h.|
00000080 b4 88 5c d5 a1 37 eb e7 10 9a c3 5a fb b8 57 ce |..\..7.....Z..W.|
00000090 c8 16 46 41 f7 e3 56 c7 b2 b4 37 58 c0 99 fd 42 |..FA..V...7X...B|
000000a0 21 fb 69 50 35 b2 74 3f 43 68 9b 78 17 9e 02 ad |!.iP5.t?Ch.x....|
000000b0 6e ab 0f 0d 5c 7d 8d 9d 35 b1 44 2b 3e 75 a5 00 |n...\}..5.D+>u..|
000000c0 ee ec 5f 62 fe 26 48 92 e7 41 6b 4b ad b7 01 8c |.._b.&H..AkK....|
000000d0 08 2c dd b9 6f 13 05 82 c7 23 d5 af 09 20 5e a9 |.,..o....#... ^.|
000000e0 21 3f 0a 85 ff af 80 75 44 53 03 f2 49 77 8d 65 |!?.....uDS..Iw.e|
000000f0 6a 26 55 cc 81 26 2b b0 48 9b c0 99 10 bc 4f 34 |j&U..&+.H.....O4|
00000100 c6 75 3b b4 50 06 d8 b8 5a 79 80 d9 78 36 95 27 |.u;.P...Zy..x6.'|
00000110 a5 f4 95 cb 9f 8a 1d 3f ed 38 fa ec 95 20 82 16 |.......?.8... ..|
00000120 a5 80 31 36 c5 52 cb 08 bb c1 cb 85 9a 9d 85 91 |..16.R..........|
00000130 e5 6a 0e 6d 08 3e 61 bf b0 a9 0e 03 3d 12 28 62 |.j.m.>a.....=.(b|
00000140 26 03 f4 b1 b7 54 23 0c b4 8d 92 99 f5 ce a0 68 |&....T#........h|
00000150 53 f2 1c f9 1d db 49 42 a5 0f de a6 bf 53 b2 54 |S.....IB.....S.T|
00000160 15 66 16 13 d6 b9 19 8a ec 8d 7d 63 2b 25 40 96 |.f........}c+%@.|
00000170 c2 a9 29 89 68 c4 13 81 ba d1 aa 13 47 77 63 ac |..).h.......Gwc.|
00000180 9e ff 8f ac 23 f3 0c e8 d1 63 88 e1 be c0 d3 08 |....#....c......|
00000190 30 c4 2c cf 74 3e ce d0 b1 6a b4 1b ba 11 e0 2f |0.,.t>...j...../|
000001a0 7f 25 aa 56 70 ff c8 88 a6 61 91 b4 6c 09 62 1c |.%.Vp....a..l.b.|
000001b0 22 31 cb 0e 7f 34 34 fc c2 30 c0 56 3c f6 00 fe |"1...44..0.V<...|
000001c0 ff ff 82 fe ff ff ee 07 00 00 f0 9f 09 00 00 fe |................|
000001d0 ff ff 05 fe ff ff 2a ae 09 00 bc 19 29 01 00 00 |......*.....)...|
000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200


now i request you pupil to help me on this.

thanx & regards.

naresh

[coffeecat]

Hi and welcome to the forum. This is what has caused your problem:


i was trying to recover some deleted files with testdisk during the rebooting process suddenly power failed for few seconds.

Testdisk is for recovering lost partitions, not lost files. Photorec, which comes with testdisk is for lost files. Anyway, testdisk appears to have rewritten your partition table and "converted" your logical sda8 partition, your Ubuntu root partition, into a primary partition, now designated sda3. Grub is still looking for sda8, but can't find it.

I suggest you try reinstalling grub. Boot up with the Ubuntu live CD - you need to use the 10.04 one to be compatible with the grub 1.97 you have installed already - choose "try Ubuntu" to get to the live desktop and run these two terminal commands:


sudo mount /dev/sda3 /mnt
sudo grub-install --root-directory=/mnt /dev/sda

Reboot and see if you can now bootup.

BUT - testdisk has introduced another and more subtle error. I'll post about this separately, so as not to confuse things. Try the grub re-install first.

[coffeecat]

@rohhaan, this is the other problem that testdisk has introduced (from your boot script output):


Drive: sda __________________________________________________ ___________________

Disk /dev/sda: 40.1 GB, 40060403712 bytes
255 heads, 63 sectors/track, 4870 cylinders, total 78242976 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 18,506,879 18,506,817 c W95 FAT32 (LBA)
/dev/sda2 18,506,943 25,788,038 7,281,096 c W95 FAT32 (LBA)
/dev/sda3 25,788,416 37,343,231 11,554,816 83 Linux
/dev/sda4 37,343,250 78,252,614 40,909,365 f W95 Extended (LBA)
/dev/sda5 37,345,280 37,976,047 630,768 82 Linux swap / Solaris
/dev/sda6 37,977,723 57,448,439 19,470,717 c W95 FAT32 (LBA)
/dev/sda7 57,448,503 78,220,484 20,771,982 c W95 FAT32 (LBA)

/dev/sda4 ends after the last sector of /dev/sda

The final sector of your extended partition (now sda4) is shown in the partition table as coming outside of the physical end of the drive - which is of course impossible. Testdisk is known to do this.

What is interesting is that your sda3 partition, formerly sda8, comes before all the logical partitions - sda5 to sda7. When it was sda8 it was a logical partition and the start sector of the extended partition would have included it. But what was sda8 would have been the first logical partition - hence the logical partitions were out of numerical order. This does not usually matter, but is what may have confused testdisk.

Anyway - the practical problem is that the erroneous end sector for sda4 will confuse Gparted and other applications. So long as the commands in my previous post work for you, you will be able to boot into Ubuntu despite the partition table irregularity, but this may become a problem further down the line. You need to fix it now. And to fix it you need fixparts. See this:

http://www.rodsbooks.com/fixparts/

A word of caution. Depending on what you do with fixparts, it *may* convert your current sda3 partition back into a logical one, with a different partition number. Which will confuse the re-installed grub. I suggest we take this one step at a time, which is why I've posted over two posts. See if you can repair grub first, and then think about using fixparts.

[rohhaan]

thanxs coffeecat :) i have completed 1st step and its successful now i am able to boot my pc

i could not understand your 2nd suggestion kindly guide me to overcome this problem too.

once again thanx

[coffeecat]

OK, have a careful read-through of the fixparts link. This is the important bit:


It can repair mis-sized extended partitions. These partitions normally serve as placeholders for logical partitions, but some partitioning tools miscompute the size of the extended partition, which can cause problems. FixParts is designed in such a way that this type of repair occurs automatically, so if it's the only problem with your disk, you can launch the program and then immediately save the partition table (as described in the upcoming section Saving Your Changes), making no manual changes, and the program will fix the problem.

That covers your situation. I read that as meaning that it will detect the extended partition end sector irregularity and fix it automatically. However, if you are more ambitious, you can use fixparts to convert your sda3 partition back to a logical one (which it was originally), but this will cause the partition number to change again (logical partitions are always numbered 5 and upwards) and may cause problems with grub again. That would be easily fixed, but you need to know in advance.

The reason I'm being a little bit cagey about what will happen with fixparts is because, although I've used it, it's not the sort of software I use every day! :wink: So I'm going partly from memory and partly from what is in that tutorial.

Try running fixparts and back out if you are uncertain. If you run it and get a grub error again, simply run the boot script, post the output and I can tell you how to amend the grub-install commands I posted earlier.

[rohhaan]

cofeecat iam unable to download fixparts when i try to download fixparts i endedup downloading gptfdisk-0.8.1 and there is a warning on fixparts tutorial page :-

Warning

Do not use gdisk if you want to use FixParts! More than one person has made that mistake, despite explicit advice to use FixParts. Unlike FixParts, gdisk is designed to work on GUID Partition Table (GPT) disks, and it will automatically convert from MBR to GPT format. This will have the effect of fixing the problems that FixParts fixes, but in most cases, and especially if Windows boots from the disk, such a conversion is inappropriate.

so tell me what to do.

thanxs and regards.

[coffeecat]

Don't, whatever you do, run gdisk. You could end up converting your partition table to a GUID one, which you don't want.

The link to the fixparts download is there on the page I linked earlier, but here it is:

http://sourceforge.net/projects/gptfdisk/files/gptfdisk/0.8.0/fixparts-binaries/

If you want to run fixparts in Ubuntu, download the .deb package, but make sure you download the correct one - i386 for 32-bit or amd64 for 64-bit. Or if you want to run fixparts in Windows, there's a zip for the Windows version on that page.

[rohhaan]

dear cofeecat i have downloaded and run fixparts it has write the mbr after saving changes i am able to boot my system now please chek the result txt from boot info script and tell if my problem is solved ?



Boot Info Script 0.60 from 17 May 2011


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

=> Grub2 (v1.97-1.98) 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
looks in partition 3 for /boot/grub.

sda1: __________________________________________________ ________________________

File system: vfat
Boot sector type: Windows XP: FAT32
Boot sector info: No errors found in the Boot Parameter Block.
Operating System: Windows XP
Boot files: /boot.ini /ntldr /NTDETECT.COM

sda2: __________________________________________________ ________________________

File system: vfat
Boot sector type: Unknown
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sda3: __________________________________________________ ________________________

File system: ext4
Boot sector type: -
Boot sector info:
Operating System: Ubuntu 10.04 LTS
Boot files: /boot/grub/grub.cfg /etc/fstab /boot/grub/core.img

sda4: __________________________________________________ ________________________

File system: Extended Partition
Boot sector type: Grub2 (v1.97-1.98)
Boot sector info: Grub2 (v1.97-1.98) is installed in the boot sector of
sda4 and looks at sector 1 of the same hard drive for
core.img, but core.img can not be found at this
location.

sda5: __________________________________________________ ________________________

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

sda6: __________________________________________________ ________________________

File system: vfat
Boot sector type: Windows XP: FAT32
Boot sector info: According to the info in the boot sector, sda6 starts
at sector 63. But according to the info from fdisk,
sda6 starts at sector 37977723. "63" and "2048" are
quite common values for the starting sector of a
logical partition and they only need to be fixed when
you want to boot Windows from a logical partition.
Operating System:
Boot files:

sda7: __________________________________________________ ________________________

File system: vfat
Boot sector type: Windows XP: FAT32
Boot sector info: According to the info in the boot sector, sda7 starts
at sector 63. But according to the info from fdisk,
sda7 starts at sector 57448503. "63" and "2048" are
quite common values for the starting sector of a
logical partition and they only need to be fixed when
you want to boot Windows from a logical partition.
Operating System:
Boot files:

sdb: __________________________________________________ _________________________

File system: vfat
Boot sector type: -
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

sdc: __________________________________________________ _________________________

File system: vfat
Boot sector type: -
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files:

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

Drive: sda __________________________________________________ ___________________

Disk /dev/sda: 40.1 GB, 40060403712 bytes
255 heads, 63 sectors/track, 4870 cylinders, total 78242976 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 18,506,879 18,506,817 c W95 FAT32 (LBA)
/dev/sda2 18,506,943 25,788,038 7,281,096 c W95 FAT32 (LBA)
/dev/sda3 25,788,416 37,343,231 11,554,816 83 Linux
/dev/sda4 37,345,279 78,220,484 40,875,206 f W95 Extended (LBA)
/dev/sda5 37,345,280 37,976,047 630,768 82 Linux swap / Solaris
/dev/sda6 37,977,723 57,448,439 19,470,717 c W95 FAT32 (LBA)
/dev/sda7 57,448,503 78,220,484 20,771,982 c W95 FAT32 (LBA)


"blkid" output: __________________________________________________ ______________

Device UUID TYPE LABEL

/dev/sda1 D468-8224 vfat
/dev/sda2 150A-3124 vfat
/dev/sda3 87091611-e9ba-4ff6-8030-b68b1f7498f5 ext4
/dev/sda5 b41ddd04-c5bd-4a88-ba76-bc04a25da13f swap
/dev/sda6 50CE-D7BC vfat
/dev/sda7 9422-2618 vfat ‰PNG

/dev/sdb DC63-0000 vfat
/dev/sdc 3F53-75BC vfat

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

Device Mount_Point Type Options

/dev/sda3 / ext4 (rw,errors=remount-ro)
/dev/sdb /media/DC63-0000 vfat (rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000, shortname=mixed,dmask=0077,utf8=1,flush)
/dev/sdc /media/3F53-75BC vfat (rw,nosuid,nodev,uhelper=udisks,uid=1000,gid=1000, shortname=mixed,dmask=0077,utf8=1,flush)


================================ sda1/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
--------------------------------------------------------------------------------

=========================== sda3/boot/grub/grub.cfg: ===========================

--------------------------------------------------------------------------------
#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by /usr/sbin/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 recordfail {
set recordfail=1
if [ -n ${have_grubenv} ]; then if [ -z ${boot_once} ]; then save_env recordfail; fi; fi
}
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
if loadfont /usr/share/grub/unicode.pf2 ; then
set gfxmode=640x480
insmod gfxterm
insmod vbe
if terminal_output gfxterm ; then true ; else
# For backward compatibility with versions of terminal.mod that don't
# understand terminal_output
terminal gfxterm
fi
fi
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
set locale_dir=($root)/boot/grub/locale
set lang=en
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
### END /etc/grub.d/05_debian_theme ###

### BEGIN /etc/grub.d/10_linux ###
menuentry 'Ubuntu, with Linux 2.6.32-21-generic' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=87091611-e9ba-4ff6-8030-b68b1f7498f5 ro quiet splash
initrd /boot/initrd.img-2.6.32-21-generic
}
menuentry 'Ubuntu, with Linux 2.6.32-21-generic (recovery mode)' --class ubuntu --class gnu-linux --class gnu --class os {
recordfail
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
echo 'Loading Linux 2.6.32-21-generic ...'
linux /boot/vmlinuz-2.6.32-21-generic root=UUID=87091611-e9ba-4ff6-8030-b68b1f7498f5 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initrd.img-2.6.32-21-generic
}
### END /etc/grub.d/10_linux ###

### BEGIN /etc/grub.d/20_memtest86+ ###
menuentry "Memory test (memtest86+)" {
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
linux16 /boot/memtest86+.bin
}
menuentry "Memory test (memtest86+, serial console 115200)" {
insmod ext2
set root='(hd0,8)'
search --no-floppy --fs-uuid --set 87091611-e9ba-4ff6-8030-b68b1f7498f5
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/sda1)" {
insmod fat
set root='(hd0,1)'
search --no-floppy --fs-uuid --set d468-8224
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 ###
--------------------------------------------------------------------------------

=============================== sda3/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/sda8 during installation
UUID=87091611-e9ba-4ff6-8030-b68b1f7498f5 / ext4 errors=remount-ro 0 1
# swap was on /dev/sda9 during installation
UUID=b41ddd04-c5bd-4a88-ba76-bc04a25da13f none swap sw 0 0
/dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0
--------------------------------------------------------------------------------

=================== sda3: Location of files loaded by Grub: ====================

GiB - GB File Fragment(s)

14.693660736 = 15.777198080 boot/grub/core.img 1
16.947658539 = 18.197409792 boot/grub/grub.cfg 1
16.240234375 = 17.437818880 boot/initrd.img-2.6.32-21-generic 2
15.769378662 = 16.932241408 boot/vmlinuz-2.6.32-21-generic 1
16.240234375 = 17.437818880 initrd.img 2
15.769378662 = 16.932241408 vmlinuz 1

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown BootLoader on sda2

00000000 eb 5a 90 4d 53 57 49 4e 34 2e 31 00 02 10 2a 00 |.Z.MSWIN4.1...*.|
00000010 02 00 00 00 00 f8 00 00 3f 00 ff 00 bf 64 1a 01 |........?....d..|
00000020 c8 19 6f 00 e2 0d 00 00 00 00 00 00 02 00 00 00 |..o.............|
00000030 01 00 06 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
00000040 80 00 29 24 31 0a 15 4e 4f 20 4e 41 4d 45 20 20 |..)$1..NO NAME |
00000050 20 20 46 41 54 33 32 20 20 20 f1 7d fa 33 c9 8e | FAT32 .}.3..|
00000060 d1 bc f8 7b 8e c1 bd 78 00 c5 76 00 1e 56 16 55 |...{...x..v..V.U|
00000070 bf 22 05 89 7e 00 89 4e 02 b1 0b fc f3 a4 8e d9 |."..~..N........|
00000080 bd 00 7c c6 45 fe 0f 8b 46 18 88 45 f9 fb 38 66 |..|.E...F..E..8f|
00000090 40 7c 04 cd 13 72 4e bf 02 00 83 7e 16 00 75 71 |@|...rN....~..uq|
000000a0 66 83 7e 24 00 74 6a 8b 46 1c 8b 56 1e b9 03 00 |f.~$.tj.F..V....|
000000b0 49 40 75 01 42 bb 00 7e e8 90 00 73 2a b0 f8 4f |I@u.B..~...s*..O|
000000c0 74 21 8b 46 32 33 d2 b9 03 00 3b c8 77 43 8b 76 |t!.F23....;.wC.v|
000000d0 0e 3b ce 73 3c 2b f1 3b c6 77 36 03 46 1c 13 56 |.;.s<+.;.w6.F..V|
000000e0 1e eb cd 73 2c eb 49 66 81 be 00 02 52 52 61 41 |...s,.If....RRaA|
000000f0 75 cc 66 81 be fc 03 00 00 55 aa 75 c1 66 81 be |u.f......U.u.f..|
00000100 fc 05 00 00 55 aa 75 b6 83 7e 2a 00 77 03 e9 ef |....U.u..~*.w...|
00000110 02 be 80 7d fb ac 98 03 f0 ac 84 c0 74 17 3c ff |...}........t.<.|
00000120 74 09 b4 0e bb 07 00 cd 10 eb ee be 83 7d eb e4 |t............}..|
00000130 be 81 7d eb df 33 c0 cd 16 5e 1f 8f 04 8f 44 02 |..}..3...^....D.|
00000140 cd 19 00 00 00 00 00 00 00 00 00 50 52 51 91 92 |...........PRQ..|
00000150 33 d2 f7 76 18 91 f7 76 18 42 87 ca f7 76 1a 8a |3..v...v.B...v..|
00000160 f2 8a 56 40 8a e8 d0 cc d0 cc 0a cc b8 01 02 cd |..V@............|
00000170 13 59 5a 58 72 09 40 75 01 42 03 5e 0b e2 cc c3 |.YZXr.@u.B.^....|
00000180 03 18 01 27 0d 0a 49 6e 76 61 6c 69 64 20 73 79 |...'..Invalid sy|
00000190 73 74 65 6d 20 64 69 73 6b ff 0d 0a 44 69 73 6b |stem disk...Disk|
000001a0 20 49 2f 4f 20 65 72 72 6f 72 ff 0d 0a 52 65 70 | I/O error...Rep|
000001b0 6c 61 63 65 20 74 68 65 20 64 69 73 6b 2c 20 61 |lace the disk, a|
000001c0 6e 64 20 74 68 65 6e 20 70 72 65 73 73 20 61 6e |nd then press an|
000001d0 79 20 6b 65 79 0d 0a 00 49 4f 20 20 20 20 20 20 |y key...IO |
000001e0 53 59 53 4d 53 44 4f 53 20 20 20 53 59 53 80 01 |SYSMSDOS SYS..|
000001f0 00 57 49 4e 42 4f 4f 54 20 53 59 53 00 00 55 aa |.WINBOOT SYS..U.|
00000200


thanx and regards.

[coffeecat]

please chek the result txt from boot info script and tell if my problem is solved ?

It is indeed. This is the important bit:



Disk /dev/sda: 40.1 GB, 40060403712 bytes
255 heads, 63 sectors/track, 4870 cylinders, total 78242976 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 18,506,879 18,506,817 c W95 FAT32 (LBA)
/dev/sda2 18,506,943 25,788,038 7,281,096 c W95 FAT32 (LBA)
/dev/sda3 25,788,416 37,343,231 11,554,816 83 Linux
/dev/sda4 37,345,279 78,220,484 40,875,206 f W95 Extended (LBA)
/dev/sda5 37,345,280 37,976,047 630,768 82 Linux swap / Solaris
/dev/sda6 37,977,723 57,448,439 19,470,717 c W95 FAT32 (LBA)
/dev/sda7 57,448,503 78,220,484 20,771,982 c W95 FAT32 (LBA)

Fixparts has done the job. The end sector of your extended partition is now recorded as inside the physical drive.

I think everything is fixed now if you can boot up OK. Good luck! :)

By the way, I added code tags to your boot script output so that there is not a wall of text.

[rohhaan]

thanx a lot cofeecat i think every thing is alright now. you were a great help.

regards.:D