fsck_msdosfs(8) on FreeBSD
The text 43c27afd3e0c, as FreeBSD 13.2-RELEASE, FreeBSD 13.1-RELEASE, FreeBSD 13.0-RELEASE shipped it.
DOS/Windows (FAT) file system consistency checker
Flags it lists
-
-C -
-F -
-M -
-f -
-n -
-p -
-y