rdump(8) on FreeBSD
The text d2bd92921bf3, as FreeBSD 11.1-RELEASE shipped it.
file system backup
Flags it lists
-
-0-9 -
-B -
-C -
-D -
-L -
-P -
-R -
-S -
-T -
-W -
-a -
-b -
-c -
-d -
-f -
-h -
-n -
-r -
-s -
-u -
-w