gmirror(8) on FreeBSD
The text 97d550150d7a, as FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE shipped it.
control utility for mirrored devices
Flags it lists
-
-F -
-a -
-b -
-d -
-f -
-h -
-i -
-n -
-p -
-s -
-v