# one where changes are made, while $MNTSNAP will contain the original
# files at the point when the snapshot was taken.
+[ ! -d "$MNTOBD" ] && mkdir $MNTOBD
+[ ! -d "$MNTSNAP" ] && mkdir $MNTSNAP
plog mount -t obdfs -odevice=/dev/obd1 none $MNTOBD
plog mount -t obdfs -oro,device=/dev/obd2 none $MNTSNAP