mount_ext2fs(8) doesn't work?
i.e.
# mount_ext2fs -o ro /dev/ad0s1 /mnt/ad0s1
From
MAKEDEV(8):
Code:
MAKEDEV -- old script for creating device nodes
DESCRIPTION
The MAKEDEV script was deprecated by devfs(5) and removed from FreeBSD
after devfs(5) became mandatory.
In short, devfs means all /dev/ entries are created automagiclly and you don't need to worry about it.