gmirror(8) on FreeBSD
The text 7f3f73f5e00c, as FreeBSD 15.1-RELEASE, FreeBSD 15.0-RELEASE shipped it.
control utility for mirrored devices
Flags it lists
-
-F -
-a -
-b -
-d -
-f -
-h -
-i -
-n -
-p -
-s -
-v