~$ sudo fsck.vfat /dev/sdc
dosfsck 3.0.7, 24 Dec 2009, FAT32, LFN
FSINFO sector has bad magic number(s):
  Offset 0: 0x0180c800 != expected 0x41615252
1) Correct
2) Don't correct (FSINFO invalid then)
? 1
FATs differ but appear to be intact. Use which FAT ?
1) Use first FAT
2) Use second FAT
? 1
Cluster 5630 out of range (25217024 > 120019). Setting to EOF.
Cluster 5631 out of range (25166208 > 120019). Setting to EOF.
Cluster 5632 out of range (29360512 > 120019). Setting to EOF.
Cluster 5634 out of range (1). Setting to EOF.
/RES_INFO.SYS
  File size is 51237 bytes, cluster chain length is 32768 bytes.
  Truncating file to 32768 bytes.
/RES_INFO.SYS  and
/DID.bin
  share clusters.
1) Truncate first to 0 bytes
2) Truncate second to 0 bytes