nefunkční mountování LVM partition

[Apteryx]

Zdravím,
mám problém s mountováním. Na notebooku Asus UL30A mám na SSD disku nainstalované ubuntu 12.10. Na jedné partition je /boot a a druhé typu LVM je zbytek (swap a data). Ubuntu nejde nabootovat (ani rescue mode), zobrazí se toto: https://docs.google.com/file/d/0B0_2T4v2zYfFR1NVRjdYXzN6RUU/edit?usp=sharing.

Když z flash disku nabootuji ubuntu 12.10, nelze namountovat LVM partition s daty. Když ji otevřu v Nautilu, vyskočí okno s textem

Kód: [Vybrat]

Error mounting /dev/dm-0 at /media/ubuntu/3af9aea6-2155-4c03-83ae-0375c1c449521: Command-line `mount -t "ext4" -o "uhelper=udisks2,nodev,nosuid" "/dev/dm-0" "/media/ubuntu/3af9aea6-2155-4c03-83ae-0375c1c449521"' exited with non-zero exit status 32: mount: wrong fs type, bad option, bad superblock on /dev/mapper/ubuntu-root,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so
Když postupuji podle http://linuxers.org/howto/how-mount-linux-lvm-volume-partitions-linux, zobrazí se stejná hláška:

Kód: [Vybrat]

root@ubuntu:/home/ubuntu# mount /dev/ubuntu/root /mnt/data
mount: wrong fs type, bad option, bad superblock on /dev/mapper/ubuntu-root,
       missing codepage or helper program, or other error
       In some cases useful info is found in syslog - try
       dmesg | tail  or so


blkid -c /dev/null -o list vypíše:

Kód: [Vybrat]

root@ubuntu:/home/ubuntu# blkid -c /dev/null -o list
device     fs_type label    mount point    UUID
-------------------------------------------------------------------------------
/dev/loop0 squashfs         /rofs         
/dev/loop1 ext3             (in use)       d8e844d6-3a9e-4844-b888-1931a642b115
/dev/sda1  ext2             (not mounted)  5e9d68da-8388-494b-a533-f3cc1c18ad76
/dev/sda5  LVM2_member      (in use)       J3opO1-uX1w-aFIz-cdAS-CvR9-tA9m-Au5DX2
/dev/mapper/ubuntu-root
           ext4             (not mounted)  3af9aea6-2155-4c03-83ae-0375c1c44952
/dev/mapper/ubuntu-swap_1
           swap             (not mounted)  d43991e0-e61c-47e3-b19c-1c7dded84cb7
/dev/sdb1  vfat    KINGSTON /cdrom         F94C-63C3

fdisk -l vypíše:

Kód: [Vybrat]

root@ubuntu:/home/ubuntu# fdisk -l

Disk /dev/sda: 64.0 GB, 64023257088 bytes
255 heads, 63 sectors/track, 7783 cylinders, total 125045424 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000db7d8

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048      499711      248832   83  Linux
/dev/sda2          501758   125044735    62271489    5  Extended
/dev/sda5          501760   125044735    62271488   8e  Linux LVM

Disk /dev/mapper/ubuntu-root: 59.5 GB, 59500396544 bytes
255 heads, 63 sectors/track, 7233 cylinders, total 116211712 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu-root doesn't contain a valid partition table

Disk /dev/mapper/ubuntu-swap_1: 4261 MB, 4261412864 bytes
255 heads, 63 sectors/track, 518 cylinders, total 8323072 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/mapper/ubuntu-swap_1 doesn't contain a valid partition table

Disk /dev/sdb: 7862 MB, 7862353920 bytes
37 heads, 37 sectors/track, 11217 cylinders, total 15356160 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000e740e

   Device Boot      Start         End      Blocks   Id  System
/dev/sdb1   *        8064    15356159     7674048    c  W95 FAT32 (LBA)

dmesg | tail vypíše:

Kód: [Vybrat]

root@ubuntu:/home/ubuntu# dmesg | tail
[ 2280.269418] Descriptor sense data with sense descriptors (in hex):
[ 2280.269421]         72 03 11 04 00 00 00 0c 00 0a 80 00 00 00 00 00
[ 2280.269435]         00 07 b0 10
[ 2280.269441] sd 0:0:0:0: >[sda] 
[ 2280.269444] Add. Sense: Unrecovered read error - auto reallocate failed
[ 2280.269448] sd 0:0:0:0: >[sda] CDB:
[ 2280.269450] Read(10): 28 00 00 07 b0 10 00 00 08 00
[ 2280.269461] end_request: I/O error, dev sda, sector 503824
[ 2280.269472] ata1: EH complete
[ 2280.269479] EXT4-fs (dm-0): can't read group descriptor 1

Poradil by mi prosím někdo, jak získat svá data? Děkuji

[Apteryx]

Vyřešeno, některé sektory nešly přečíst (I/O error), tak jsem pomocí ddrescue vytvořil obraz disku a ten namountoval pomocí

Kód: [Vybrat]

mount /cesta-k-obrazu/image.img /mnt/data -t ext4 -o ro