newfs(8) on FreeBSD
The text 37e5b18e7c1a, as FreeBSD 10.2-RELEASE shipped it.
construct a new UFS1/UFS2 file system
Flags it lists
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-E -
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-U -
-a -
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-c -
-d -
-e -
-f -
-g -
-h -
-i -
-j -
-k -
-l -
-m -
-n -
-o -
-p -
-r -
-s -
-t