Asustor AS-604T NAS server review: Highly sophisticated NAS server, simplified

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CNET Editors' Rating

4 stars Excellent
  • Overall: 8.5
  • Design and setup: 9.0
  • Features: 9.0
  • Performance: 9.0
  • Service and support: 8.0

Average User Rating

5 stars 1 user review
Review Date:
Updated on:

The Good The Asustor AS-604T NAS server is fast and highly customizable, and its Web interface is robust and intuitive.

The Bad You can't quickly, dynamically scale up the server's storage space, and it's slightly more expensive than its peers.

The Bottom Line Not only is the Asustor AS-604T an excellent NAS server for serious network storage needs, it's also very easy to use thanks to the extremely well-designed user interface.

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The four-bay AS-604T NAS server is the first storage product I've reviewed from Asustor -- the storage division of Asus -- and it was quite a pleasant surprise. The server was very fast in my testing, and its Web-based user interface looks and functions very similarly to that of an iOS device. This means if you can handle the iPad, you can probably manage this server.

The server is highly customizable and offers virtually all you'd ask for from a NAS server and possibly even more. Its long list of free add-on apps makes it one of the most comprehensive network storage products I've seen.

The AS-604T's only shortcoming is the lack of a special RAID configuration that could scale up its storage dynamically and cut down RAID build time. At around $720 (no storage included), it's also slightly more expensive than some other equally excellent four-bay NAS servers, such as the Synology DiskStation DS412+. The AS-604T NAS has a lot more peripheral ports, however, and would be an excellent investment for a home or a small office that needs a robust storage system. For others, check out our list of top-notch NAS servers.

Design setup
The Asustor AS-604T NAS server comes with no storage included, but installing your own hard drives is a very quick process, thanks to the front-facing drive bays. Each of these bays includes a tray that can be easily unlocked and pulled out. After that it's simple to assemble a standard 3.5-inch hard drive on it. There are more than enough screws included for all four hard drives, always a good thing. You don't need to fill all four drive bays to use the server, but it's recommended that you do so, and use drives of the highest capacity for your storage needs.

It's very easy to install/replace the AS-604T's hard drives thanks to the server's excellent drive bay design.
It's very easy to install or replace the AS-604T's hard drives, thanks to the server's excellent drive bay design. Dong Ngo/CNET

This is because the AS-604T supports only standard RAID configurations (RAID 0, RAID 6, and RAID 5) and not any special RAID. ( Read more about RAID configurations .) This means once you've set it up, there's no way to change to larger-capacity drives without rebuilding the RAID from the beginning. Other NAS servers, such as those from Synology, Netgear, and LaCie, come with a vendor-specific RAID configuration that makes it possible to dynamically scale up the storage space without even turning the server off.

With current hard drives maxing out at 4TB each, the AS-604T offers up to 16TB of unprotected storage space in RAID 0 or 12TB of protected storage space in RAID 5. It took me just about 5 minutes to install all four hard drives, and when I turned the server on for the first time, it prompted me, via a tiny LCD screen located on top of the drive bays, to initiate the server. This LCD is accompanied by four navigation buttons that enable you to interact with the server. When I pressed the button to answer affirmatively to the prompt, the server automatically started building the four hard drives into a RAID 5 setup.

The Asustor Control Center desktop software makes setting up the NAS server an easy job.
The Asustor Control Center desktop software makes setting up the NAS server an easy job. Screenshot by Dong Ngo/CNET

This was the first time I've experienced a RAID build without the need for a computer. While the server was building the RAID, I finished the rest of the setup process, including hooking it up to the network and installing setup software on a connected computer. The server comes with a CD of the Asustor Control Center desktop applications that detect the NAS server in the network, perform quick basic setup, and help launch the Web interface from which you can manage all of the router's features and settings. The server's interface can also be reached by pointing a browser to its IP address. The default log-in information is "admin" for both username and password.

While the setup process took just a few minutes, I couldn't test the server's performance until much later because the RAID-building process with four 1TB hard drives took a couple of hours to finish. Generally, RAID build time can be very long, ranging from a few hours to more than a day, depending on the type of RAID and the total storage space. This is a common issue with standard RAID configurations, which is another reason why some vendors opt for a special RAID configuration.

Also on the front of the server are a USB 3.0 port and a One-Touch backup button that can be used to quickly back up an external drive to the server's internal storage or back up the server's shared folder to the connected external hard drive. You can change the function of this One-Touch backup feature via the server's Web interface.

The Asustor AS-604T offers the most peripheral ports I've seen in a four-bay NAS server.
The Asustor AS-604T offers the most peripheral ports I've seen in a four-bay NAS server. Dong Ngo/CNET

On the back, the server comes with another USB 3.0 port, four USB 2.0 ports, and two eSATA ports. This is the largest number of peripheral ports I've seen in a NAS server. Using these ports you can add more storage to the server, as well as other peripheral devices, such as printers or Wi-Fi adapters. On top of that, the server also comes with an HDMI port (in case you want to connect it to a big-screen TV), and two Gigabit Ethernet network ports.

iOS-like Web interface
If you like the user interface of iOS devices, such as the iPad, you'll like the Web interface of the AS-604T, because once you're logged in, you'll be presented with almost exactly the same interface.

The interface Web page is designed to hold three rows of app icons, with five icons in each row. There are a few icons that are integrated with the server's management and settings that can't be removed, such as Settings, App Central, and Storage Manager. The rest of them belong to add-on applications and will disappear when you remove or disable the associated apps. The page holds up to 15 icons. You can also create more pages, then move icons between them by right-clicking the icon and selecting to move it to the desired page. You can scroll back and forth between pages, and name the pages to your liking. Essentially it's the same procedure you'd use to organize apps on an iPad.

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Quick Specifications See All

  • Connector Type 7 pin external Serial ATA
  • Type hot-swap
  • Data Link Protocol Fast Ethernet
  • Compatibility Unix
  • Total Storage Capacity 0 GB