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Performance

Although the DNS-313 is an entry-level NAS, it may produce interesting test results. We’d want to know the difference in the effective data-transfer rate of its USB and Ethernet interfaces since their theoretical bandwidth is comparable. We used the following equipment for our tests:

  • Category 5e Ethernet cable
  • Cable for connecting the DNS-313 to a USB port
  • Intel Centrino notebook
  • Seagate Barracuda 7200.10 hard drive (250GB, SATA)
  • IOMeter
  • FlashFXP FTP manager

First of all we tested the NAS’s bandwidth with the IOMeter software. There were two test modes: when the DNS-313 was connected via LAN or directly to the notebook’s USB port. In both cases we tested the speed of writing and reading in two patterns: 512 bytes and 64 kilobytes. The first pattern reveals the maximum amount of disk operations per second, and the second pattern shows the maximum data-transfer rate. Here are the results:

Mode

Read

Write

Network

512B

IO/s

1847.15

1376.69

MB/s

0.9

0.67

64K

IO/s

195.89

154.10

MB/s

12.24

9.63

USB

512B

IO/s

2225.95

2001.2

MB/s

1.09

0.98

64K

IO/s

494.67

395.96

MB/s

30.92

24.75

The results make it clear once again that we are dealing with an entry-level device. However, it does quite well for its class. The use of Gigabit Ethernet is just a marketing trick because the data-transfer rate is within 100Mbps. The DNS-313 is not impressive as an external USB drive, either.

Next we performed another group of tests to benchmark the integrated FTP server. As usual, there were three types of multimedia content: a 30MB folder with 130 photographs (S), a 130MB album with MP3 music (M) and a 3.7GB DVD image (L). The iTunes and media servers had been disabled before this test.

The results are somewhat better here. Of course, the speeds are rather low, but comparable to those of many midrange NASes. The only unclear thing is why the speed of reading the folder with music is lower than the speed of writing the same folder.

Having tested the DNS-313 in typical usage scenarios, we can claim that this model is quite good in terms of performance for an entry-level NAS. We guess using both its interfaces is going to be the optimal variant. That is, you can run the DNS-313 as a FTP or iTunes server but large amounts of data should be loaded to the integrated hard drive via USB.

 
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