$ fsck_msdos.tenderloin -nv /dev/store/media
Checking we can access the last sector of the filesystem
FSINFO sector has bad magic number(s):
  Offset 0: 0x52526141 != expected 0x41615252
  Offset 484: 0x72724161 != expected 0x61417272
  Offset 510: 0x55aa != expected 0xaa55
  Auto-correcting it.
Logical sector size (2 bytes) is not a multiple of the physical sector size.