Auto mount a drive that located on Ubuntu and auto share that drive for Window

I divide it into two parts:

1). Mount the drive at boot time:
    * sudo vi /etc/fstab
    * then add this line:  /dev/sda3    /media/lnxBackUp  ext4  users,user      0  0
      In my case, sda3 is the drive that I would like to mount and ext4 is the partition of sda3.

2). Install samba server:
    * sudo apt-get install samba
    * sudo vi /etc/samba/smb.conf
      then edit its config file by adding these information at the end of the page:
    [lnxBackUp]
          writable = yes
          path = /media/lnxBackUp
          guest ok = yes
          create mask = 0777
          comment = Backup drive
          directory mask = 0777
    * Create a folder in /media
    * sudo mkdir /medir/lnxBackUp
    * sudo mount -a

Now, you can access a drive shared (lnxBackUp) from Window.

cheers