zpool-initialize(8) on FreeBSD
The text d4f1208dbd30, as FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE, FreeBSD 13.3-RELEASE shipped it.
write to unallocated regions of ZFS storage pool
Flags it lists
-
--cancel -
--suspend -
--uninit -
--wait -
-c -
-s -
-u -
-w