$ sudo fsck -y /dev/sdc1
fsck from util-linux 2.27.1
e2fsck 1.42.13 (17-May-2015)
/dev/sdc1: clean, 304068/1368064 files, 3255041/5469696 blocks

$ sudo fsck -y /dev/sdc
fsck from util-linux 2.27.1
e2fsck 1.42.13 (17-May-2015)
ext2fs_open2: Bad magic number in super-block
fsck.ext2: Superblock invalid, trying backup blocks...
fsck.ext2: Bad magic number in super-block while trying to open /dev/sdc

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem. If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
e2fsck -b 8193 <device>
or
e2fsck -b 32768 <device>

Select a media (use Arrow keys, then press Enter):

Disk /dev/sda - 1000 GB / 931 GiB - HGST HTS541010A9E680

Disk /dev/sdb - 120 GB / 111 GiB - Mass Storage Device

Disk /dev/sdc - 31 GB / 29 GiB - Generic- SD/MMC

Disk /dev/mmcblk0 - 31 GB / 28 GiB

Intel partition table type has been detected.

Disk /dev/sdc - 31 GB / 29 GiB - CHS 30436 64 32
Current partition structure:
Partition Start End Size in sectors

1 * Linux 71 0 1 21436 63 32 43757568

Warning: Bad ending sector (CHS and LBA don't match)
2 P HPFS - NTFS 21437 0 1 30435 63 32 18429952

Warning: Bad starting sector (CHS and LBA don't match)


*=Primary bootable P=Primary L=Logical E=Extended D=Deleted

Disk /dev/sdc - 31 GB / 29 GiB - CHS 30436 64 32
Partition Start End Size in sectors
* Linux 0 1 32 21366 1 31 43757568
P HPFS - NTFS 21437 0 1 30435 63 32 18429952

No partition 21366 1 32 21436 63 32 145345


[Cylinder] [ Head ] [ Sector ] [Cylinder] [ Head ] [ Sector ]
[ Type ] [ Done ]

GParted 0.25.0 --enable-libparted-dmraid --enable-online-resize

Libparted 3.2
Check and repair file system (ext2) on /dev/sdc1 00:00:43 ( SUCCESS )

calibrate /dev/sdc1 00:00:00 ( SUCCESS )

path: /dev/sdc1 (partition)
start: 145408
end: 43902975
size: 43757568 (20.87 GiB)
check file system on /dev/sdc1 for errors and (if possible) fix them 00:00:43 ( SUCCESS )

e2fsck -f -y -v -C 0 /dev/sdc1 00:00:43 ( SUCCESS )

Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information

304068 inodes used (22.23%, out of 1368064)
18194 non-contiguous files (6.0%)
341 non-contiguous directories (0.1%)
# of inodes with ind/dind/tind blocks: 15830/280/0
3255041 blocks used (59.51%, out of 5469696)
0 bad blocks
1 large file

238364 regular files
35989 directories
1 character device file
0 block device files
0 fifos
35 links
29140 symbolic links (27509 fast symbolic links)
565 sockets
------------
304094 files
e2fsck 1.42.13 (17-May-2015)
grow file system to fill the partition 00:00:00 ( SUCCESS )

resize2fs -p /dev/sdc1 00:00:00 ( SUCCESS )

resize2fs 1.42.13 (17-May-2015)
The filesystem is already 5469696 (4k) blocks long. Nothing to do!