This has been tested on Jessie with the PIXEL Desktop. I haven’t tested it in previous versions. Substitute the IP address in fstab and the share name, as appropriate!

# Make a directory in /mnt
sudo mkdir /mnt/DataDisk

# Edit fstab:
sudo nano /etc/fstab

# Add a line with a similar format as below
//192.168.178.240/DataDisk /mnt/DataDisk cifs guest,iocharset=utf8,_netdev,x-systemd.automount 0 0

# Reboot and check that things mount OK after a reboot
sudo shutdown -r now