newfs(8) on FreeBSD
The text d29fda3f68fb, as FreeBSD 8.2-RELEASE shipped it.
construct a new UFS1/UFS2 file system
Flags it lists
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-a -
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-c -
-d -
-e -
-f -
-g -
-h -
-i -
-l -
-m -
-n -
-o -
-p -
-r -
-s