2.2.11 mkfs.ext4 does not support the documented -f option

The man page for mkfs.ext4 describes an optional command line parameter, -f, to specify fragment size. However, this option was removed when support for creating bigalloc file systems was added. Attempts to create an ext4 file system using the mkfs.ext4 command in conjunction with this option may result in an error notifying the user of an invalid option. (Bug ID 25512202)