newfs(8) on OpenBSD
The text 166625ec73d3, as OpenBSD 6.9, OpenBSD 6.8 shipped it.
construct a new file system
Flags it lists
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-N -
-O -
-P -
-S -
-T -
-b -
-c -
-e -
-f -
-g -
-h -
-i -
-m -
-o -
-q -
-s -
-t