Disk /dev/sdc - 500 GB / 465 GiB - CHS 60801 255 63

     Partition                  Start        End    Size in sectors

  ext4                     0   0  1 60801  80 55  976773160
superblock 32768, blocksize=4096 []
superblock 98304, blocksize=4096 []
superblock 163840, blocksize=4096 []
superblock 229376, blocksize=4096 []
superblock 294912, blocksize=4096 []
superblock 819200, blocksize=4096 []
superblock 884736, blocksize=4096 []
superblock 1605632, blocksize=4096 []
superblock 2654208, blocksize=4096 []
superblock 4096000, blocksize=4096 []

To repair the filesystem using alternate superblock, run
fsck.ext4 -p -b superblock -B blocksize device