Setup a NAS Server on Raspberry Pi

In this article, we will set up a simple NAS server from scratch, based on the SMB protocol. The goal is to save files on the NAS server and share them between different computer clients. For this project, we’ll need a Raspberry Pi 2 or Pi3 with a running Rasbian and connected to some Network. Make sure you have access to the terminal or you’re logged in to the Raspberry Pi via SSH connection.
For the file storage, we need an external USB Hard-drive with a storage capacity of your choice.

Prepare your RPi

Let’s assume that the Raspbian operating system is already installed and running on RPi. Connect your device to the Network via a wired connection or via WLAN and open a terminal.
On the first step, we need to make sure that all packages are of the latest version.

$ sudo apt-get update

If the Raspbian is up to date, we are ready to set up our NAS server.

Install and Setup Samba Server

1. To share files from our NAS server we need to install the Samba package. This includes all the required apps and configuration files to set up the SMB protocol.

$ sudo apt-get install samba samba-common-bin

2. After the installation, we need to configure the smb services. For that, we need to configure the sharing of an internal directory. For this case, we will create the directory and name it “INTERNAL” in the home path of our Pi user:
3. Now open the /etc/samba/smb.conf file in an editor of your choice and enter the configuration options for the INTERNAL sharing at the end of the file like shown below.

[INTERNAL] comment = internal Files browseable = yes path = /home/pi/INTERNAL writeable = Yes create mask = 0777 directory mask = 0777 browseable = Yes public = yes

Bear it in your mind that the file must be modified under the root rights. Otherwise, the changes won’t be implemented. There is a very quick and simple way to open the file under the root:

$ sudo leafpad /etc/samba/smb.conf

You’ll see the editor window to input the data we’ve mentioned above.
4. After that, you need to get
access to the sharing, we’ve just created. For that, the user Pi should be allowed to be the Samba user.

$ sudo smbpasswd -a pi

Then, enter a password twice and restart the Samba server.

$ sudo /etc/init.d/samba restart

5. Now we are moving over to a Windows 7 client to check if the Samba server is configured correctly and we have access to our sharing directory.
On Windows open the Explorer and choose “Map network drive” from the Menu:
In the dialog window, enter the IP-address of your Raspberry Pi and the configured share name “INTERNAL” as shown below.
Note: Be sure you replace the 192.168.17.73 with your own IP address and enable both ticks. Now enter the username “pi” and the password we’ve set up with the smbpasswd command earlier.
After that, we are connected with the Raspberry Pi and we can save and share our files.
To make sure everything is OK, we can create a directory “Directory” and inside this directory, we can create a “Dokument.rtf” file. If all the operations are done and you can find this file, so our system is working the right way!
Back to the Raspberry Pi sharing directory, we must also see the newly created files, like that:

Prepare an external drive

If we want to provide a larger amount of file space we connect an external USB drive to Raspberry Pi. In this tutorial, we are going to use a 1TB external USB HDD with an NTFS file system to expand our storage pool.
6. So, connect the external USB hard drive to the device. With the command lsblk, we can check all the connected devices.
As you see above, the mmcblk0 device is the SD card which contains two partitions for the Raspbian operating system. The sda device is the external USB disk already connected to the RasPi. As we can see, the sda device contains one partition sda1 with a size of 931.5 Gb. The sda1 partition contains an NTFS file system.
7. To mount this file system we need to install the “ntfs-3g” package.

$ sudo apt-get install ntfs-3g

8. The next step is to create an “EXTERNAL” folder:

$ sudo mkdir /EXTERNAL

So, I should mention one important thing in this step. It looks like the latest models of Raspberry Pi 2 and Raspberry Pi 3 can automatically mount the devices. According to my personal experience, once an HDD is connected, the Raspbian creates a folder with a name “New Folder” or alike and mounts your device to it. If you face the same, simply fulfill the following command to unmount the device from the needless folder:

$ sudo umount /media/pi/New\ Folder/

If it is done, we can mount the external drive to the new directory.
9. To automatically mount an HDD to the system, we have to modify the /etc/fstab file. For that, I advise to use the root command mentioned before to open up the file:

$ sudo leafpad /etc/fstab

In the editor, input the data outlined in the picture below:
10. Now we have to reboot and check if the external disk was mounted automatically.
As you can see above, the external hard drive partition /dev/sda1 is already mounted to the EXTERNAL mount point. For testing purposes, we can create a directory and a file inside the EXTERNAL directory.

Other Alternatives for NAS Server on Raspberry

As an alternative to your own NAS, you can use ready built NAS storage server applications like Openmediavault, Freenas, Nas4free, and others. These application packages are easy to install and comes with a Web-Interface to configure. They are made for managing the storage and file sharing to other users within the Network.

As the first alternative, let’s look through the Openmediavault service. This is a web based NAS service for Debian Linux (Jessie) devices, including the Raspberry Pi ones. For the RPi option, there is a Raspberry Pi 3 image (download from here). As soon as you have it on your device, the installation process is pretty simple.

1. Download the Raspberry Pi 3 NAS image (using the link above).
2. Create an SD card for Raspbian with the proper OMV image on it. For that, we can use the Win32DiskImager app just the same way, as we have used it for setting up Raspberry Pi Backup.
3. Insert the SD card into your Raspbian device and watch the configuration to be completed automatically.
4. To finish the setup, input your Raspberry Pi IP address.
5. After that, connect to the IP address you’ve provided in the previous step via Chromium browser (or whatever you use on your Pi).
6. Set up the username and the password (the username is “admin” by default).
7. The interface is quite user-friendly, so you’ll be able to add your hard drive by purely following the guidelines.
8. Don’t forget to enable the service by entering the SMB/CIFS directory and pushing the switch-on button.
9. You can also enable the guest access in the “Shares” directory (it’s optional).
10. Then… You’re done!

Another service to your consideration is Nas4Free. Generally, this app is very close to the OMV we’ve just described. The only thing is that the installation process a little bit simpler and faster, to my opinion. Nas4Free has almost the same features and capabilities. To set up Nas4Free on your Raspbian, follow these few simple steps:

1. Download the latest image. I’d advise you to choose “NAS4Free-rpi2-SD-10.3.0.3.4529.img” (download the image).
2. Create an SD card with the image on it. Use Win32DiskImager and the same example guide we’ve mentioned earlier.
3. Insert the SD card into your Raspbian device and let the installation run automatically.
4. To finish the setup, input your Raspberry Pi IP address.
5. You are all set!

While using Nas4Free with on RPi remember 2 simple notes. Firstly, the image of 11.x will is released only for RPi2 and 3. And secondly, it is highly recommended to overclock your Raspberry Pi from 600 MHz to 900 MHz. For that, you need to enable the Power Daemon in the System|Advanced settings of your Raspberry Pi.
For the last thing, I’d like to say a few words about FreeNAS, as another alternative for RPi NAS. It is an online Open Source and BSD Licensed service for sharing and storing files using any hardware platform, including ARM-based devices.
Telling the truth, Freenas is considered to be not the best variant for building up NAS on Raspberry. This is not only personal opinion, but the community thinks the same (check the StackExchange thread here). In a nutshell, FreeNAS is aimed to be used within really big (even huge) projects and requires a powerful computer. The 8GB of RAM is required for the FreeNAS 11 to be run properly, which, obviously, can’t be met by even the latest 2017 model of Raspberry Pi (you can make sure on their download page).
Still, there is a common way to install FreeNAS on Raspberry Pi using the combination of ExaGear and Wine, but even the 3D hardware graphics acceleration, provided by ExaGear Desktop, won’t get you acceptable performance. Anyway, you are free to try that scheme. For that use the tutorial described in the article Wine on Raspberry Pi (or you may find Raspberry Pi Owncloud tutorial relatively closer).