mkfs.gfs2(8) on Linux
The text 321b02b2cb7a, as Debian 9 (Stretch) shipped it.
create a gfs2 filesystem
Flags it lists
-
-D -
-J -
-K -
-O -
-V -
-b -
-c -
-h -
-j -
-o -
-p -
-q -
-r -
-t