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