fsck.vfat -n exited with status code 1
Warning: Filesystem is FAT32 according to fat_length and fat32_length fields,
  but has only 11 clusters, less than the required minimum of 65525.
  This may lead to problems on some systems.
fsck.fat 4.2 (2021-01-31)
There are differences between boot sector and its backup.
This is mostly harmless. Differences: (offset:original/backup)
  30:00/06, 62:00/4c, 63:00/56, 64:80/00, 66:29/00, 67:0b/00, 68:f3/00
  , 69:d9/00, 149:50/00, 150:6c/00, 474:04/00, 496:00/80
  Not automatically fixing this.
FSINFO sector has bad magic number(s):
  Offset 484: 0x80417272 != expected 0x61417272
  Auto-correcting it.
/Af
  Bad short file name (Af).
  Auto-renaming it.
  Renamed to FSCK0000.000
/FI1
  Bad short file name (FI1).
  Auto-renaming it.
  Renamed to FSCK0000.001
/FSCK0000.000
  Start cluster beyond limit (4294901760 > 12). Truncating file.
/FSCK0000.000
  File size is 4294967295 bytes, cluster chain length is 0 bytes.
  Truncating file to 0 bytes.
Reclaimed 1 unused cluster (4096 bytes).
Free cluster summary uninitialized (should be 4)

Leaving filesystem unchanged.
/tmp/434654947.img: 6 files, 7/11 clusters