newfs_hfs(8) on macOS
The text 6d9a02ca4873, as Mac OS X 10.2.8.G5, Mac OS X 10.2.8, Mac OS X 10.2.7, Mac OS X 10.2.6, Mac OS X 10.2.5, Mac OS X 10.2.4, Mac OS X 10.2.3, Mac OS X 10.2.2 shipped it.
construct a new HFS Plus file system
Flags it lists
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-N -
-b -
-c -
-h -
-i -
-j -
-n -
-v -
-w