Mdconfig
From FreeBSDwiki
mdconfig is the command used to create RAMdisks and mount ISO files under FreeBSD 5.x and up.
vnconfig was used in 4.x and prior for the same purpose, but is not applicable for FreeBSD versions after 4.x.
mdconfig is the command used to create RAMdisks and mount ISO files under FreeBSD 5.x and up.
vnconfig was used in 4.x and prior for the same purpose, but is not applicable for FreeBSD versions after 4.x.