NETGEAR ReadyNAS Duo 2-Bay 500 GB (1 x 500 GB) Network Attached Storage RND2150

by Netgear

Product Details

• Product Dimensions: 10 x 6.9 x 11.4 inches ; 4.6 pounds
• Shipping Weight: 9.4 pounds
• Shipping: This item is also available for shipping to select countries outside the U.S.
• ASIN: B0013G04AQ
• Item model number: RND2150-100NAS
• Average Customer Review: 3.7 out of 5 stars  See all reviews (229 customer reviews)
• Date first available at Amazon.com: December 19, 2005

Product Description

Capacity: 500 GB (1 x 500 GB)

From the Manufacturer

We recently reviewed the NETGEAR ReadyNAS NV+, a network attached storage device, or NAS, that's built for small offices and work groups. We were so impressed with its performance that we decided to test NETGEAR's home-user model, the ReadyNAS Duo, to see if it measures up to its bigger sibling's performance.

The ReadyNAS Duo can serve as a digital media server for your home. View larger.

We're happy to report that the ReadyNAS Duo rivals the NV+, but at a fraction of the price. Built for the home-user and home office, this compact, powerful, and surprisingly quiet and energy-efficient device has just about everything you need to keep your digital media easily accessible and protected.

Unfortunately we don't have the space to describe everything we admire about this outstanding NAS device. What we can describe are several features that stood out, including its compact design and easy set-up, quiet and energy-efficient performance, web-, print-server and advanced media streaming features, and its outstanding data protection capabilities. (Our review of the ReadyNAS NV+ covered the system's RAID array functionality, as well several other features that the Duo shares.)

In short, this is an advanced NAS device that anyone who is serious about digital media should consider for their home network.

Easy Set-Up and Compact Design
In addition to this 500 GB version, the NETGEAR ReadyNAS Duo comes with 750 GB, and 1 TB capacities. The models share identical features, with the difference being the amount of storage in each. The version we tested, the RND2150, included a single 500 GB SATA drive in a hot-swappable carrier with room for a second drive alongside it. (Each of the models ships with a single hard disk drive and can be easily upgraded for data redundancy by installing a second compatible disk drive of equal or higher capacity. The new disk drive will automatically mirror the first drive.)

While the initial set-up with the system's extremely intuitive interface took less than 20 minutes, getting the information for the more advanced-user procedures took a bit more time. NETGEAR does not ship the Duo with extensive user guides. Instead, users are directed to ReadyNAS's online community forum (www.readynas.com) for advanced set-up procedures and add-ons. While navigating the forum for information can be time consuming, the site is constantly updated by NETGEAR developers and community members. We found information easy to locate and well presented.

Like the NV+, users do not need an technical background to configure the Duo. However, a knowledge of network basics, and an ability to search for and install basic files is a must. And anyone with even a modicum of networking experience will find the Duo a breeze to work with.

The Duo is smaller than a breadbox and is constructed with a sturdy metal chassis and door. It includes a Gigabit Ethernet port and two USB 2.0 ports on the back, and an extra USB port at the front along with a "backup" button.

With two drive bays, you can easily upgrade the Duo for data redundancy. View larger.

The Duo is designed to work with virtually any USB storage device and USB printer. We began by plugging a flash drive, external hard drive and a printer directly into the Duo. In each case, the devices appeared as shared drives on our network computers, and the printer connected to the device without a hitch, giving the networked computers instant printing abilities.

Overall Set-Up and Design Grade: A-
We would prefer to have more documentation included with the hardware, but the online forum is an excellent source of information.

Quiet and Energy-Efficient Performance
A huge plus for us is the ReadyNAS Duo's quiet performance. A fan sits at the back of the device, softly humming. Although we disagree with the NETGEAR marketing materials and wouldn't sleep with the Duo, we wouldn't hesitate to set it alongside a home theater system, or in another common area. Compared to many other NAS devices, the ReadyNAS Duo is as quiet and unobtrusive as they come.

In an idle state, our single-disk Duo consumes only 27 Watts of power (or about 35 Watts with two drives installed), and a bit more than that with disk activity. In disk spin-down mode, power consumption goes down to a mere 12 Watts. This is a huge savings when compared to the 100 Watts or more from most computers with comparable storage and RAID abilities.

The Duo also lets you schedule partial or complete shut downs for additional efficiencies. So if you plan to use the device as your primary digital media server or for scheduled back ups of your data, these energy savings will quickly add up.

Overall Power Performance and Noise-Level Grade: A
What a relief to keep our carbon print (and electricity bills) low--quietly and unobtrusively.

Web Server and Advanced Media Streaming Features
Our primary reason for wanting the Duo was to serve our digital media from a single source and reduce the work load of our personal computers. With the Duo, you can kiss goodbye the need to keep your computers running when you want to stream media files. The Duo can connect via your network to such devices as the NETGEAR EVA8000, Sonos Digital Music System, Logitech Squeezebox, Apple iTunes clients, Sony Playstation 3 and Microsoft Xbox 360. In fact, it will work with just about any DLNA-compliant device.

Once we loaded our entire music collection onto the server and launched the Duo's built-in iTunes server, our music was immediately available through iTunes on our personal computers. But what really made us smile was that our digital music became instantly available through our Logitech Squeezbox player, bypassing our computers entirely. This means that we now have 24/7 wireless access to our entire digital music collection without having to turn on our computers. On the down side, because the Duo's SlimServer add-on does not offer the software's most recent updates, functionality is slightly compromised, but the advantages of instant, uninterrupted access to our music library far outweighs those inconveniences.

The ReadyNAS Duo can serve files to all your computers and compatible media players in your home.

We were also able to access our personal video files seamlessly through our networked computers. While we found performance to be virtually indistinguishable from playing the files directly on our hard drives, if we were streaming HD video over our wireless network we would have needed to use Wireless-N to ensure steady performance. (If you're looking to do this NETGEAR recommends a purpose-built product called the 5GHz Wireless-N Bridge Kit, or one of their 200MB Powerline Network Adapters.) We also found that editing large raw video files was best accomplished directly off our local hard drive and uploading the edited files to the Duo, but this was more a function of our network connections than it was with the Duo's performance.

NETGEAR's FrontView web-based control panel makes configuration and administration simple. View larger.

Another nice touch is the Duo's Web server capability. With about 20 minutes of configuration time, you can serve your own personal Web Site or blog. Set-up was much easier and quicker than uploading to a remote hosting site. Obviously, if you have visions of launching the next hot social network site, neither the Duo (or your Internet connection) will be able to handle the traffic. But for your own Web site or personal blog, it will stand up nicely.

Overall Web Server and Media Streaming Grade: B+
Once ReadyNAS is able to update firmware concurrently with the media device updates, you'll never need a computer to serve your media files again.

Advanced Data Protection
What truly allows the Duo to live up to its "advanced NAS" moniker is it wealth of data protection features, especially its X-RAID technology, "Continuous Data Protection or CDP," and its scheduled back up abilities.

Just add a second 500 GB disk drive into the empty bay, and the ReadyNAS Duo will automatically build a mirror of the first drive by copying every byte from the first drive to the second one. In case of any hard drive failure, the data is protected. We had a SATA 500GB drive on hand, so we tried this. It was as easy as securing the drive with four screws onto the carrier and plugging the drive in. The data mirroring is taken care of automatically on the fly by the unique X-RAID.

ReadyNAS Duo also includes a feature we're enthralled with called "Shadow" that not only backs up folders and files every time you save them on your computer, but also gives you the ability to save and revert to previous versions of the files. If your local file is lost or corrupted, you simply right click on the back-up file on the Duo to restore it to its original location. Every user on our network accessed this feature without a glitch. As featured on the Duo, CDP is a powerful way to keep your files protected.

And to keep the files on the Duo protected, we scheduled back-ups to a connected external USB drive. The Duo flawlessly performed a full back up the first time, and incremental back ups thereafter. And a convenient "back-up button" located on the front of the device lets you back up your entire system, or parts of it, with a single click. With the X-RAID and the backup features provided by the Duo, you'll never have an excuse to lose a byte of data again.

Overall Data Protection Grade: A
With the Duo, we will have to work hard to ever lose data again.

Conclusions
The ReadyNAS Duo is a powerful, attractive, and flexible NAS device that is great for a home network. It offers much of the functionality of a dedicated server, but since set up is mostly plug-and-play, it does not require a dedicated IT personnel to manage. As noted, the manual does not give all the answers. Fortunately, the strong online community and Web forums offer excellent support and services. And finally, the ReadyNAS Duo is backed by an industry-leading 5-year warranty, so you can rest assured that you'll be protected should anything go wrong.

What's in the Box
ReadyNAS Duo with 500 GB hard disk drive, two hard disk trays, quick installation guide, warranty card, power adapter, power cable, Ethernet cable, ReadyNAS Installation CD and Discovery Utility, and NTI Shadow for ReadyNAS for Windows and Macintosh.

Product Description

Create a multimedia entertainment system without having to buy another computer! Netgear’s new ReadyNAS Duo (1 X 500 GB) RND2000 allows you to directly stream music, photos and video to existing networked media players – without a PC. You can even use it to build a personal web page to easily share photos with friends and family members. Uniquely designed for NAS (Network Attached Storage) at home, the Netgear ReadyNAS Duo is perfect for households that have more than one computer. Unlike a USB drive, the ReadyNAS connects to the network and makes your data simultaneously accessible via all your connected Windows of Macintosh computers. And you can use it anywhere via the Internet to gain access to your stored data! Plus, the ReadyNAS Duo’s can be outfitted with an optional "spare" hard drive to protect you against drive failure by making a duplicate copy of all your data. This innovative device supports most network music, picture, and video players. Store, access, and share your data with the ReadyNAS Duo.

Customer Reviews

Most Helpful Customer Reviews

235 of 238 people found the following review helpful:

5.0 out of 5 stars Comparison of ReadyNAS Duo, Iomega ix2, LaCie, HP for small office use, March 15, 2009

By 

Edward Barnett (Cambridge, MA United States) - See all my reviews
(TOP 500 REVIEWER)    (VINE VOICE)   

Amazon Verified Purchase

This review is from: NETGEAR ReadyNAS Duo 2-Bay 500 GB (1 x 500 GB) Network Attached Storage RND2150 (Personal Computers)

This product is one of a number of network attached storage (NAS) devices on the market targeted at small offices and home users. If you're not familiar with NAS devices, the concept is simple: A NAS device contains one or more hard drives and plugs directly into your network (i.e., your router). When compared to simple USB hard drives that plug directly into a computer, a NAS offers a number of advantages:

1) It is accessible to any computer on your network. This is convenient at home, since you can use the NAS as a central repository for files (documents, photos, music files, etc.) that you might want to access from any of a number of different PCs. In a small office, having a central storage location for key files (client documents, contact lists, etc.) can be critical.

2) In principle, you could achieve the same benefit by attaching a big USB drive to one PC, setting that PC up to share its files, then leaving that PC on all the time. But these NAS devices are better optimized for file sharing, use far less energy, and take up far less space than a full PC.

3) Most of these NAS devices have something called RAID. They have (or allow you to install) multiple hard drives in the same unit, then they write every bit of data to multiple drives. This way, if one drive fails (as they are prone to do), the NAS can automatically switch over to the other drive and you don't lose any data. One HUGE warning, though - RAID only protects you from drive failure. NAS devices still have plenty of "single points of failure," including the power supply, controller, etc. I lost all of my data on a LaCie Network Disk because of a software glitch in the unit, even though all the individual drivers were fine. RAID reduces your risk of losing files, but it does not eliminate it.

4) Because the NAS is always available to any PC on the network, it's a great solution for backing up individual PCs, in addition to operating as a file server.

I am currently using a number of different NAS products in both my small business and my home. Here is a summary of the pros and cons of the three models I am currently using: Netgear's ReadyNAS Duo, EMC Iomega's ix2, and LaCie's Ethernet Disk RAID NAS. I'll call out only areas in which I see significant differences between the products. Also, this review is intended mainly for small office users - the features you might care about for a home NAS are likely to be different (e.g., you'd probably care about how well it works as an iTunes library or for streaming movies, neither of which is key in our office setting). Here goes:

1) Netgear ReadyNAS Duo. This is a smaller, two-drive version of Netgear's ReadyNAS product (originally developed by a company called Infrant, which Netgear acquired). It takes up very little space, uses relatively little power, and is fairly quiet. Reads and writes to this device are very fast, which is important when running backups. The ReadyNAS has a particularly robust feature set when it comes to backing up the NAS to another device on the network. This is important, since even with RAID, it's possible that the whole device will fail (e.g., if the power supply goes bad), so you want to make sure you back up your NAS regularly. Setup isn't hard, but you have to know what you're doing - this device is clearly targeted at somewhat technical users who know the terminology and are willing to work through all the configuration menus. This is our primary file server in our office, and it has been a reliable workhorse. About once every 2-3 months, I need to log on to fix something that has glitched - other than that, the ReadyNAS Duo has required no effort beyond setup. It's one of the best small NAS products I've used.

2) Iomega ix2. Iomega is now owned by EMC, the company that creates the monster-sized storage devices for big corporations. The ix2 is incredibly small - it takes up about as much space as a tape dispenser. Of the small office NAS products I've installed, it has the easiest setup - the configuration menus aren't quite Mac-like, but they're the closest of any NAS I've used. The ix2 does the best job of setting up multiple users - it automatically creates private folders for each user and makes it very easy to control permissions to shared folders. The ix2 is by far and away the lowest cost NAS I've used, at under $200 for a 1TB configuration. The ix2 comes with two drives preinstalled, but the drives are not user replaceable; I would have liked replaceable drives, but I'm willing to live with this tradeoff since it yields a very small and cheap unit. (Some users think non-replaceable drives are a show stopper. Personally, I'm just counting on my RAID to prevent loss of files if a drive fails. If a drive does fail, I'm more likely to replace the whole NAS, given the rate at which features are improving and prices are dropping, rather than just replacing the drive.) The ix2 excels as a backup solution for PCs - it comes with software to automatically backup any PC on the network to the devices. One important missing feature, though, is the ability to back up the NAS to another storage device on your network - this is very important in an office setting if you are using the NAS as your primary file server, rather than as a backup for your PCs. Because of this missing feature, we use the ix2 as our backup storage device, not as our primary file server. The ix2 has proved highly reliable and trouble free - like the ReadyNAS Duo, it runs for months at a time without anybody having to tweak anything.

3) LaCie 301160U 1TB Ethernet Disk RAID Network Attached Storage. If you've gotten the impression that I love the ReadyNAS Duo and ix2, you're right. Balancing the cosmic scales is the LaCie Ethernet Disk, which caused us nothing but headaches. The LaCie NAS configuration menus are opaque, even to a reasonably knowledgeable person. The device is hard for users to find on the network. The device is painfully slow - backing up large numbers of files to or from the device takes forever. It does not come with software to back up PCs to the device, and it lacks the feature to back itself up to other devices. It's big and noisy. And, most importantly, it's unreliable. On multiple occasions, the device simply disappeared from the network, forcing us to reset the device (which takes a while). The last time this happened, the device couldn't read its hard drives when it rebooted. I spent hours with LaCie tech support, but nothing worked. We ended up losing ALL of the files on the device. LaCie ended up replacing the device, but that didn't save our data. Having read other reviews with similar complaints, I know my experience wasn't a fluke. This is not a reliable product.

4) HP MediaVault. I have a MediaVault 2100 installed at home, and I really like it. It has more consumer-oriented configuration and usage menus than the products reviewed above. It also does a nifty job of handling media files, which is more important at home. In particular, it works as a great central iTunes library, automatically sweeping music files from my individual PCs up to a central shared folder on the NAS. The individual PCs in turn can then access the NAS folder (as if it were an attached iPod). This means that everybody in the house has access to any songs anybody else has downloaded. I tried using the MediaVault briefly in our office, but it didn't work nearly as well as the ReadyNAS or ix2. It wasn't fast enough and (true to its name) the setup options seem clearly designed for a home multimedia environment rather than an office file environment.

5) Buffalo. I haven't used a Buffalo NAS since I installed the Netgear ReadyNAS and EMC/Iomega ix2 devices, so I can't offer an up-to-date comparison. The Buffalo device that I replaced was OK, but it wasn't nearly as fast, compact, or feature rich as the Netgear and Iomega products.

In a nutshell, I've been very pleased with my Netgear ReadyNAS Duo and Iomega ix2 in the office, and with my HP MediaVault at home. The LaCie NAS was very bad, and the Buffalo products I've used have been OK but usually not the best in class. I hope this helps.

137 of 138 people found the following review helpful:

5.0 out of 5 stars An UltraSPARC server, October 13, 2008

By 

Stefan Brunner (Austin, Texas) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: NETGEAR ReadyNAS Duo 2-Bay 500 GB (1 x 500 GB) Network Attached Storage RND2150 (Personal Computers)

The Netgear ReadyNAS Duo appears to based on the old UltraSPARC architecture, complemented with a SATA controller. It runs Debian for SPARC and Netgear permits root access to the box to install whatever you want. The box is quiet nice. It does Netgear's own proprietary XRAID mirroring (but not RAID 0). XRAID apparently allows the automatic upgrade to more then two drives, if you would use it in a Netgear box, which supports more then two drives. Unlike with other home office NAS, the firmware is saved in a flash and not on the drives itself. The drives are hot swappable and rebuild themselves automatically unlike with many other personal NAS products. The NAS can share directories via CIFS, NFS, AFP, and HTTP. It also can do FTP and TFTP, which comes in handy in the lab. The ReadyNAS comes with a print server, which is useless as it does not support bi-directional communication, required by most printers these days. You can also share USB 2.0 HD or flash drives, which the ReadyNAS will make available as a share. It can be configured via the WebUI or via standard Linux CLI at your own risk.

It comes with some "services" pre installed: iTunes server, Logitech Squeezecenter, and industry standard Home Media Streaming server and UPnP AV server. It features the BitTorrent server and some proprietary photo sharing server. Since it is Linux you can run your own Webserver. Apache is preinstalled and Netgear tells you how can activate it via CLI you. You can also use it as DNS or DHCP server but you need to install it via CLI yourself. I would be careful to activate too many services as those tax CPU of course. It is a server, but by modern standards a small one. Performance is decent though.

I notice some time lack when opening a file but read and writes are just under 9 MB/s, just about under 100Mbps Ethernet. Writes are a bit slower when journaling is turned on. You can also turn off journaling and connect the box to an UPS. It works with the newer home and commercial APC UPS with USB port. You have granular control over rights and quotas in the framework of the EXT Linux file system. You can manage those rights via the WebUI or the good old Unix way via CLI.

The most important application for me is the built-in backup. It does RSYNC, FTP, HTTP, NFS and a CIFS based clientless backup. You only need to share your files on your notebook/desktop/server, and it will diff it every night and you do not have to worry to loose any files in case your HD should crash. I am still backing up to DVD on regular intervals.

Basically it is Linux server, based in the UltraSPAR, a top of the line server technology 10 years ago. It is better then just building a Linux server, because the box is small, cheap, and only uses up 20W opposed to 200W or more of a real server, which makes a difference when it runs 24/7. The box is slightly larger the two 3.5" HDs stacked. The ReadyNAS is very quiet. When it first was formatting the drives the fan ran at full speed and was noisy but then they slowed down to 1500 RPM and you hardly can hear it. The box stays cool. Most people will not use the Linux CLI but rather the intuitive and easy WebUI.

It is cheaper to build your own then by the loaded version. Believe it or not the 500GB version is cheaper then the on without drives. I configured the system with mirrored 1TB drives:

- Netgear ReadyNAS RND-2150

- 2x Seagate ST31000340AS

- Crucial CT12864X335 1GB RAM

- APC Back-UPS ES BE750G

The ReadyNAS is reportedly very picky on hardware combinations and you need to check Netgear's hardware compatibility list.

355 of 369 people found the following review helpful:

5.0 out of 5 stars RAID works, survives hard disk failure, May 17, 2008

By 

Tek Know Wiz (California, USA) - See all my reviews

This review is from: NETGEAR ReadyNAS Duo 2-Bay 500 GB (1 x 500 GB) Network Attached Storage RND2150 (Personal Computers)

What is Amazon Vine and why do these reviewers write so much stuff without saying anything? This review is for people who want to know only one thing: Does this device actually survive a disk failure? The answer is Yes.

My sister recently lost 2 of her external USB hard drives. She had to pay $3000 to a data recovery company to retrieve her data. I figure that $400 for a Netgear ReadyNAS Duo is small change, if it actually did what it claimed to do, which is survive a disk crash. The only way to know was to test it out.

I have about 40 GB worth of MP3 files stored on my Linux server, accessible to my Windows laptop using Samba as a network shared folder.

From my Windows laptop, I started copying the MP3 files into the \media share folder on the Duo. Over gigabit ethernet, I estimated a transfer speed of about 15-20 MB/second. More than I expected, considering the weak processing power of the embedded Linux computer on the Duo, and because there are 2 concurrent network copies going on, from Linux to Windows, then from Windows to Netgear. Gigabit ethernet is awesome.

While the copy was in progress, I inserted a second 750 GB hard disk (a Seagate Barracuda 7200.11 series if you are curious; my Duo came with one 500 GB Seagate Barracuda 7200.11 installed) into the second slot. The Netgear recognized it and started to incorporate it into the RAID system in 2 steps: first, format the drive (an ext3 Linux filesystem I think), took about 2.5 hours; second, synchronize the data from the first disk to the second disk, took another 2.5 hours. During this time, the 40 GB MP3 file transfer continued without a hitch.

Next, I configured the Duo to enable NFS (Network File System) and mounted the /media folder onto my Linux box. Now I had access to both the original and the copy on the Duo. I ran a "diff -r" command to do a recursive binary diff between the two directories. Came out perfect, no file corruptions.

I went back to my Windows laptop, and started another 40 GB copy of my MP3 files to the Duo. While the write was in progress, I _removed_ the 500 GB disk. The Duo detected a disk failure within a few seconds, and sent off a notification email to my GMail account, warning me of a disk failure. You can configure the notification email address to send the message to, say, your SMS on your mobile phone. As before, the MP3 copy to the Duo continued without a burp.

I then inserted a second 750 GB drive into the first slot, while the copying was still in progress. The Duo formatted and synchronized the new disk, and after about 5-6 hours, I once again had a fully redundant RAID system. Did another 'diff -r' just to make sure the data was not corrupted. None found.

When upgrading from a single 500 GB to dual 750 GB disks, the proprietary Netgear X-RAID filesystem makes the process as painless as possible. After both disks are formatted and synchronized, all you need to do is click on a button in the admin web interface (don't remmeber the exact wording, something like "Expand Volume") to take advantage of the bigger disks.

In conclusion, I tested the Netgear Duo through a simulated hard disk crash and hot-swapping disk upgrade, and found that it performed perfectly, did not corrupt the files which were being written to it during the process. The Duo performs reasonably well (15-20 MB/sec write speed over gigabit ethernet) and costs only about $400, far cheaper than what you'd pay to recover your data after your disk crashes. It has an impressive list of other useful features (USB backup, USB printer, NFS, Rsync, FTP, Bittorrent, etc) that you can read about in other reviews. The most important question for me was, will it survive a disk crash? I won't know for sure until a disk really does crash, but based on my testing, I think the answer is Yes.

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