Create a new file /etc/init.d/umountfs containing:
#!/bin/sh
# Begin /etc/init.d/umountfs
check_status()
{
if [ $? = 0 ]
then
echo "OK"
else
echo "FAILED"
fi
}
echo "Deactivating swap..."
/bin/swapoff -a
check_status
echo -n "Unmounting file systems..."
/bin/umount -a -r
check_status
# End /etc/init.d/umountfs