newfs(8) on OpenBSD
The text 31e3adf19a7a, as OpenBSD 2.8, OpenBSD 2.7 shipped it.
construct a new file system
Flags it lists
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-N -
-O -
-S -
-U -
-a -
-b -
-c -
-d -
-e -
-f -
-o -
-q -
-r -
-s -
-t -
-u -
-z