/etc/fstab

#Device         Mountpt FStype  Options                         Dump    Pass#
#======         ======= ======  =======                         ====    =====
/dev/ad0s1a     /       ufs     ro                              1       1
/dev/null       /mfs    mfs     rw,-s=20480,-m=0,-T=minimum     0       0
proc            /proc   procfs  rw                              0       0