disklabel(8) on OpenBSD
The text d129216912ed, as OpenBSD 3.9, OpenBSD 3.8, OpenBSD 3.7 shipped it.
read and write disk pack label
Flags it lists
-
-B -
-E -
-N -
-R -
-W -
-b -
-c -
-d -
-e -
-f -
-n -
-p -
-r -
-s -
-t -
-v -
-w