gfs_mkfs(8) on Linux
The text 2f1c0d948601, as Debian 4.0 (Etch) shipped it.
Make a GFS filesystem
Flags it lists
-
-D -
-J -
-O -
-V -
-b -
-h -
-j -
-p -
-q -
-r -
-s -
-t