zpool-attach(8) on FreeBSD
The text 3e9521d2eb1b, as FreeBSD 14.5-RELEASE, FreeBSD 14.4-RELEASE, FreeBSD 14.3-RELEASE, FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 14.0-RELEASE shipped it.
attach new device to existing ZFS vdev
Flags it lists
-
-f -
-o -
-s -
-w