|NETGEAR ReadyNAS NV+ v2 NAS Server|
|Reviews - Featured Reviews: Network|
|Written by Bruce Normann|
|Tuesday, 31 July 2012|
Page 10 of 15
1GB Single-Disk Test Results
The bottom line for any storage device is the combination of capacity and transfer speed. For a network attached storage server, the differences are all about the infrastructure that is placed around the basic HDD array. Since capacity is something that's easy to define and measure, the real question for any NAS product is how fast will it Read and Write data. For this reason, Benchmark Reviews primarily measures NAS performance as the bandwidth achieved during a file transfer test. The first tests we perform utilize a single 1GB (1000 megabytes / 1,000,000,000 bytes) file in a transfer to and from the NAS.
Since we started testing NAS units exclusively with Win 7, there aren't as many prior test results to compare with. We'll try and build up the NAS testing as best we can in the next year. With all the NAS units operating in single disk mode, most of the units have broadly similar performance. The TS-879U-RP tops the 1 GB Read tests, primarily due to its faster CPU. The rest of the QNAP units run in the mid-80 MB/s range, with little difference between Atom-based and Marvell-based models. The ReadyNAS NV+ v2 achieves a 63.6 MB/s read speed with a single disk installed using the X-RAID2 disk management protocol. All results for this model are with an MTU of 1500, since Jumbo Frame capability is not available on the Ethernet connection of the ReadyNAS NV+ v2. Most people who buy a 4-bay NAS don't care too much about single disk performance, but it's useful to get an understanding of any possible issues with the basic architecture of the system.
Moving on to the 1 GB write bandwidth test, there is a wider diversity within our results, with significant variation introduced by the MTU setting on the network interface. The QNAP TS-879U-RP posts the top numbers again, and the write speeds of the other models follow along with the pricing of the units and the processing power of their installed CPU. In general, the Intel Atom-based models are performing better than the Marvell-based units with the weaker CPUs. The ReadyNAS NV+ v2 achieves a 42.8 MB/s write speed with a single disk, installed using the X-RAID2 disk management protocol. Don't worry about the relative position of the ReadyNAS NV+ v2 on this list, the QNAPs are high-end models with high-end prices. The top model listed here goes for around $3,000 without disks.
Next up is 10 GB (1000 metric megabytes / 10,000,000,000 bytes) file transfer testing. Using the single-disk configuration in each NAS, and a Gigabit Ethernet connection, network throughput will be put to the test, and the effect of any system or hardware caches will be minimized.
10GB Single-Disk Test Results
Examining 10GB basic file transfer speeds, the mid-range QNAP models all got a boost, compared to the 1 GB file transfers. Their read speed went up by approximately 10 MB/s, to a combined average of 95 MB/s. The TS-879U-RP delivered similar read performance with the two file sizes, as did the NETGEAR ReadyNAS NV+ v2. Interesting that the least and most expensive units in the test were not affected like the others.... The TS-879U-RP is built to handle the higher throughput of an eight-disk array in a corporate LAN environment, and it shows. The ReadyNAS has an infrastructure that is less than one tenth the cost, and that's what determines its performance here. Once again, you get none of the advantages of redundancy with a single disk or JBOD, and most NAS users will go for one of the RAID configurations. These figures are not what the average user will experience; those will be seen later in our RAID 5 tests.
In our 10GB write performance tests, the performance of all the NAS units is similar to their showing with the smaller sized, 1 GB file. The ReadyNAS NV+ v2 hits the exact same performance level, at 42.8 MB/s. One of the things I noticed while testing the ReadyNAS unit was the consistency of the results. During timed runs, the results were never more than two seconds apart; in most cases I had three or more runs with the exact same elapsed time.
Next we're going to look at RAID 5 performance, where the NETGEAR ReadyNAS NV+ v2 will have to compete with some heavy-duty challengers in the QNAP product line. Since the QNAP TS-259 Pro and TS-219P+ don't support the RAID5 configuration that we normally use to test large format NAS products, we won't be able to include their results in this next comparison.
NAS Comparison Products