Even with its default settings, the Duo's performance puts it near the top of our NAS Charts for dual drive NAS devices. I compared the Duo to a few other dual drive NAS boxes the: Thecus Yes 2100, Buffalo Link Station Pro and Synology DS207+.
As you can see in in Figures 19 and 20, the Duo's throughput performance for disk Write Performance with file sizes from 32 MB to 1 GB on both 100 Mbps and 1000 Mbps LANs is excellent, with the Duo coming in second only to the Synology DS207+.
Figure 19: Write Performance comparison - 100 Mbps LAN
Figure 20: Write Performance comparison - 1000 Mbps LAN
Figures 21 and 22 show the Duo is at the top of the charts for throughput performance for disk Read Performance with smaller file sizes of 32 MB to 128 MB on 100 Mbps and 1000 Mbps LANs. With larger file sizes of 256 MB to 1 GB, however, the Duo's Read performance drops below the Buffalo Link Station Pro's.
Figure 21: Read Performance comparison - 100 Mbps LAN
Figure 22: Read Performance comparison - 1000 Mbps LAN
Run your own comparisons using the NAS Charts.
The Buffalo, Thecus, Synology and Netgear products compared in the Performance section and in Table 2 below are have dual SATA drives and gigabit Ethernet with jumbo frame LAN interaces, but have different features and performance.
The Duo comes in as the most expensive of the three, but only $12 more expensive than the Synology and with similar performance. But keep in mind that the Duo includes a disk drive while the Synology is a BYOD device. The Buffalo is the bargain of the group with dual drives included, but its performance is also at the bottom.
|NAS||Price||Disks Included||Media Server|
|Netgear ReadyNAS Duo||$352||1||Y|
|Buffalo LinkStation Pro||$282||2||N|
|Thecus Yes 2100||$280||0||Y|
Table 2: Price comparison
Overall, I came away with a positive impression of the ReadyNAS Duo. I rebooted, reconfigured, ran copy operations, re-synchronized and tested its features repeatedly without it hanging or crashing. The menus are logical and easy to work with, performance is solid, and I had no problem mapping five different PCs to one or more shares on the Duo.
Even though it adds to the total cost, I recommend if you're going to put all your digital files on a Duo, get the second drive right away to ensure you have the redundancy of the XRAID functionality.
But there are some negatives, including the internal backup utility bug, security cable problem and lack of admin screen timeout. The Photo Sharing application also seems unnecessarily complicated, especially when compared to other NAS photo sharing features that don't require a web service running on a computer.
With a redundant XRAID ReadyNAS Duo on your network, you'll have the peace of mind that you're no longer among the 52% of this country who are just a hard drive failure away from losing valuable iTunes files and thousands of digital pictures. My experience with the Duo certainly gave me the impression I could trust the Duo with my digital family memories!