newfs(8) on OpenBSD
The text a4d2e5092e2e, as OpenBSD 3.5 shipped it.
construct a new file system
Flags it lists
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-N -
-O -
-S -
-a -
-b -
-c -
-d -
-e -
-f -
-g -
-h -
-o -
-q -
-r -
-s -
-t -
-u -
-z