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[ubuntu] unknown filesystem after command

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Hi gals and guys!

I've wanted to fix some problems, e.g. Linux loads only sometimes upon restart and since I've executed
Code:

sudo fsck -yv /dev/sda1
I can't restart PC anymore.

All what I see is just
Code:

error: unknown fileystem.
grub rescue> _


I've tried to fix it with Live CD with no luck.

Here is fdisk -l
Code:

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000bfa1e

  Device Boot      Start        End      Blocks  Id  System
/dev/sda1  *          1      19087  153312256  83  Linux
/dev/sda2          19087      19458    2975745    5  Extended
/dev/sda5          19087      19458    2975744  82  Linux swap / Solaris

Disk /dev/sdb: 61.9 GB, 61918150656 bytes
255 heads, 63 sectors/track, 7527 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x20455945

  Device Boot      Start        End      Blocks  Id  System
/dev/sdb1              1        7527    60460596    c  W95 FAT32 (LBA)

Disk /dev/sdc: 1997 MB, 1997537280 bytes
255 heads, 63 sectors/track, 242 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

  Device Boot      Start        End      Blocks  Id  System
/dev/sdc1  *          1        243    1950656    b  W95 FAT32
Partition 1 has different physical/logical endings:
    phys=(241, 254, 63) logical=(242, 217, 39)

and fdisk -lu
Code:

Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders, total 312581808 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: 0x000bfa1e

  Device Boot      Start        End      Blocks  Id  System
/dev/sda1  *        2048  306626559  153312256  83  Linux
/dev/sda2      306628606  312580095    2975745    5  Extended
/dev/sda5      306628608  312580095    2975744  82  Linux swap / Solaris

Disk /dev/sdb: 61.9 GB, 61918150656 bytes
255 heads, 63 sectors/track, 7527 cylinders, total 120933888 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: 0x20455945

  Device Boot      Start        End      Blocks  Id  System
/dev/sdb1              63  120921254    60460596    c  W95 FAT32 (LBA)

Disk /dev/sdc: 1997 MB, 1997537280 bytes
255 heads, 63 sectors/track, 242 cylinders, total 3901440 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

  Device Boot      Start        End      Blocks  Id  System
/dev/sdc1  *        128    3901439    1950656    b  W95 FAT32
Partition 1 has different physical/logical endings:
    phys=(241, 254, 63) logical=(242, 217, 39)


I'd like to have my system working again, without reinstalling it.


Thank you all in advance for your help!

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