Восстановление раздела ext4

Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdb2,
      missing codepage or helper program, or other error
      In some cases useful info is found in syslog - try
      dmesg | tail  or so

kostya@kostya-linux:~$ dmesg | tail
[ 1840.043229] Info fld=0x0
[ 1840.043232] sd 2:0:0:0: [sdb]  Add. Sense: No additional sense information
[ 1840.043238] sd 2:0:0:0: [sdb] CDB: Read(10): 28 00 00 00 00 40 00 00 08 00
[ 1840.043250] end_request: I/O error, dev sdb, sector 64
[ 1840.659165] EXT4-fs (sdb2): bad geometry: first datablock 1009836508 is beyond end of filesystem (133999616)
[ 1840.793055] EXT3-fs: barriers not enabled
[ 1840.816105] kjournald starting.  Commit interval 5 seconds
[ 1840.816901] EXT3-fs (sdb1): using internal journal
[ 1840.816910] EXT3-fs (sdb1): recovery complete
[ 1840.816917] EXT3-fs (sdb1): mounted filesystem with ordered data mode

kostya@kostya-linux:~$ sudo fsck -y /dev/sdb2
[sudo] password for kostya:
fsck from util-linux-ng 2.17.2
e2fsck 1.41.14 (22-Dec-2010)
fsck.ext4: Superblock invalid, trying backup blocks...
fsck.ext4: The ext2 superblock is corrupt при попытке открыть /dev/sdb2

The superблок could not be read or does not describe a correct ext2
ФС.  If the устройство is valid and it really contains an ext2
ФС (and not swap or ufs or something else), then the superблок
is corrupt, and you might try running e2fsck with an alternate superблок:
    e2fsck -b 8193 <устройство>

kostya@kostya-linux:~$ sudo mke2fs -n /dev/sdb2
mke2fs 1.41.14 (22-Dec-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
33505280 inod'ов, 133999616 блоков
6699980 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
4090 block groups
32768 blocks per group, 32768 fragments per group
8192 inod'ов в группе
Superblock backups stored on blocks:
   32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
   4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968,
   102400000

The superблок could not be read or does not describe a correct ext2
ФС.  If the устройство is valid and it really contains an ext2
ФС (and not swap or ufs or something else), then the superблок
is corrupt, and you might try running e2fsck with an alternate superблок:
    e2fsck -b 8193 <устройство>