The D-Link ShareCenter Pulse DNS-320 is a 2-bay Network Attached Storage (NAS) device that can share movies, photos and music across a network. It can operate hard drives in a RAID configuration and can share media to DLNA devices.

The added bonus is that is can act as a print server and allow a USB printer to be shared amongst devices on your network.

Features:
- 2-bay Network Attached Storage for 3.5" SATA drives
- Gigabit connectivity for fast transmission speeds
- User/group quotas for security and confidentiality
- UPnP Media Server to stream media content to compatible media players
- Web file server for easy access to your over the Internet
- Built-in BitTorrent client to download directly from the Internet without a PC
- Touch-button for one-step backup of USB memory sticks
- Print Server to share a printer with other users in the network
- RAID 1 technology to automatically mirror the contents of one of its hard drives to the other
- FarStone Backup software included free
- D-Link Green: energy-saving design

Real World Performance
Here are some numbers from NAS-Tweaks.net:

Configuration	Write	Read
Single Disks	25MB/s	30MB/s
RAID 0	24MB/s	36MB/s
RAID 1	23MB/s	29MB/s

I am using a Raid 1 configuration and get numbers similiar to the above. The actual transfer rate depends on the size and quantity of the files.

Install FunPlug
It is possible to modify the DNS-320 and install additional software. In order to do this you need to install a small utility called "fun_plug". This is a mechanism D-Link incorporated within it's devices to allow them to be tweaked by advanced users. The installation is quick and easy. Just follow the instructions here :

HDD-Installation of the fun_plug 0.7 on NAS-devices

Install Twonky 7
The default DLNA media server supplied with the 320 is very basic. Using it from my TV was awful because I had to browse through unneccessary folder levels to get to my content. Using Twonky means when I select "Video" on my TV I am presented with my video collection without any fuss.
Installing Twonky is fairly easy as long as you can carefully follow the instructions presented here :

Installation of Twonky Server 7 on NAS-devices

Upgrade Twonky 7
I initially installed Twonky version 7.0.5 using the above instructions. Today I upgraded to version 7.0.9. Assuming you can remember your root password the procedure is fairly easy.

I connected to the 320 from my PC via SSH using Putty. I then used the following command line instructions to upgrade to 7.0.9.

 sh /ffp/start/twonky.sh stop



 cd /ffp/opt/twonky



 wget http://www.twonkyforum.com/downloads/7.0.9-Special/twonky-kurobox-pro-special-7.0.9.zip



 unzip twonky-*.zip



 rm twonky-*.zip



 sh /ffp/start/twonky.sh start

The process above stops the twonky server, downloads the new package, extracts the new files and overwrites the old ones and then restarts the server.