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