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Old 07-29-2005, 03:19 AM   #1
ElVirolo
LQ Newbie
 
Registered: Jul 2004
Location: France
Posts: 8

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Partition recovery


Hi all !

My hard disk used to be divided into 5 partitions :

/dev/hda1 was fat32 with Windows XP on it 5 (~ 30 GB)
/dev/hda3 was ext3, and empty : i wanted to install Ubuntu Lite on it (~10 GB)
/dev/hda7 (but not sure about the number) was etx3 : / partition for Ubuntu (~ 5 GB)
/dev/hda8 (not sure) was swap (~ 500 GB)
/dev/hda9 (not sure) was /home ( ~ 40 GB)

I tried to install Ubuntu Lite, but before the installer had even started up, it started fiddling my my partitions (by running mkswap) ... So I rebooted the machine ... and of course GRUB wouldn't show up anymore ... So I started Knoppix up to see what was wrong.

Here's my /etc/fstab under Knoppix :

Code:
/proc      /proc       proc   defaults            0 0
/sys       /sys        sysfs  noauto              0 0
/dev/pts   /dev/pts    devpts mode=0622           0 0
/dev/fd0   /mnt/auto/floppy auto   user,noauto,exec,umask=000    0 0
/dev/cdrom /mnt/auto/cdrom  auto   user,noauto,exec,ro 0 0
/dev/cdrom1 /mnt/auto/cdrom1  auto   users,noauto,exec,ro 0 0
# Added by KNOPPIX
/dev/hda1 none swap defaults 0 0
# Added by KNOPPIX
/dev/hda2 /mnt/hda2 auto noauto,users,exec 0 0
So Knoppix has only detected /dev/hda1 and /dev/hda2 ...

/dev/hda is definitely swap. And I can't mount /dev/hda2 :

This is what sudo mount /dev/hda2 /mnt/hda2 shows :


Code:
mount: you must specify the filesystem type
So I tried mounting is as ext2, ext3 and vfat, and it says :
Code:
mount: wrong fs type, bad option, bad superblock on /dev/hda2,
       missing codepage or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so
However, fdisk says /dev/hda2 is of type 83 (Linux) ...


What shall I do to get my old partitions back ?

Thanks in advance,

Alex.
 
Old 07-29-2005, 03:42 AM   #2
[|RoA|]RoadRunner
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Registered: Jul 2005
Distribution: LFS
Posts: 43

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At first look, it seems to happened that a command from You destroyed the partition table of /dev/hda.

You can give testdisk a try to find the lost partitions. It can restore the partition table of a HD, but read the doc's carefully.

Although, please clear out what partition is swap? First You talk of /dev/hda8, later You tell /dev/hda ( 1? ) is or was swap.
 
Old 07-29-2005, 03:44 AM   #3
ElVirolo
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Registered: Jul 2004
Location: France
Posts: 8

Original Poster
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Thanks, I'll look it up right now ...

Well, I think /dev/hda8 _used_ to be swap ... What is sure now is that /dev/hda1 _is_ swap.


Thanks again,

Alex.
 
Old 07-29-2005, 03:55 AM   #4
ElVirolo
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Registered: Jul 2004
Location: France
Posts: 8

Original Poster
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Strangely enough, testdisk seems to detect only /dev/hdc (my CD burner) ... Maybe I should download UltimateBootCD to see...

I checked the log, and only /dev/hdc appears...

Last edited by ElVirolo; 07-29-2005 at 04:00 AM.
 
Old 07-29-2005, 07:14 AM   #5
ElVirolo
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Registered: Jul 2004
Location: France
Posts: 8

Original Poster
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Well, I tried testdisk, but it doesn't find my old partitions ... Here's the log :

Code:
Fri Jul 29 11:56:02 2005
TestDisk command line : /log /debug
TestDisk 5.3, Data Recovery Utility, May 2004
Christophe GRENIER <grenier@cgsecurity.org>
http://www.cgsecurity.org
Linux version
Using locale 'C'.
file_read(4,1,buffer,160087724(9964/254/63)) seek err Invalid argument
file_read(5,1,buffer,240974(14/254/63)) seek err Invalid argument
Hard disk list
Disk /dev/hda - CHS 9964 255 63 - 78159 MB
Disk /dev/hdc - CHS 14 255 63 - 109 MB


Analyse Disk /dev/hda - CHS 9964 255 63 - 78159 MB
Geometry from MBR: head=255 sector=63
check_part 83
get_geometry_from_list_part_aux head=255 nbr=2
Current partitions:
 1 P Linux Swap               0   1  1    24 254 63     401562
No EXT2, JFS or Reiser marker
 2 * Linux                   25   0  1  9963 254 63  159670035
 2 * Linux                   25   0  1  9963 254 63  159670035

search_part()
Disk /dev/hda - CHS 9964 255 63 - 78159 MB
   D Linux Swap               0   1  1    24 254 45     401544

recover_EXT2: s_block_group_nr=0/117, s_mnt_count=0/29, s_blocks_per_group=32768
recover_EXT2: boot_sector=0, s_blocksize=4096
recover_EXT2: s_blocks_count 3857608
recover_EXT2: part_size 30860864
   D Linux                 3863   0  1  5783 254 62   30860864
     EXT3 Sparse superblock 
   D Linux Swap            5784   0  1  5846 254 40    1012072
get_geometry_from_list_part_aux head=8 nbr=1
get_geometry_from_list_part_aux head=255 nbr=3

Results
   * Linux Swap               0   1  1    24 254 63     401562
   P Linux                 3863   0  1  5783 254 63   30860865
     EXT3 Sparse superblock 
   P Linux Swap            5784   0  1  5846 254 63    1012095

interface_write()
 1 * Linux Swap               0   1  1    24 254 63     401562
 2 P Linux                 3863   0  1  5783 254 63   30860865
 3 P Linux Swap            5784   0  1  5846 254 63    1012095
simulate write!

write_mbr: starting...
write_all_log: starting...
New options :
 Paranoid : No
 Dump : No
Cylinder boundary : Yes
 Mode : Fast
 Allow partial last cylinder : No
 Ask partition order : No
 Halt on errors : Yes
 Maximize extended part : No
 Expert mode : No

TestDisk exited normally.
Could anyone help me ?

Thanks,

Alex.
 
Old 07-29-2005, 02:41 PM   #6
[|RoA|]RoadRunner
Member
 
Registered: Jul 2005
Distribution: LFS
Posts: 43

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Testdisk found three partitions on hda, one ext3-linux and two swap. You can direct testdisk to " search deeper " for partitions. This may take several hours and often does not bring THE result.

At this point You will restore the last backup of Your HD or install again ( formatting, etc. ).

Maybe Anyone on this Forum can give other helpful suggestions?
 
Old 07-30-2005, 03:25 AM   #7
ElVirolo
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Registered: Jul 2004
Location: France
Posts: 8

Original Poster
Rep: Reputation: 0
Thanks for your help, but even "searching deeper" didn't get helpful results ... So I formatted the hard disk and installed my (old) backup...

Thanks again,

Alex.
 
  


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