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Performance - 1 Gbps

The gigabit performance plots are a bit more involved, so I separated them into two sets of charts. The first shows gigabit performance with a mix of JBOD and RAID 0 results. JBOD and RAID 0 aren't exactly the same thing, but are close enough in function that NAS manufacturers tend to use the terms interchangeably and support only one or the other. The N5200, however, supports both JBOD and RAID 0 modes.

Figure 22 shows the 5200 in JBOD mode and the Synology CS406 in RAID 0 mode, both with and without 4 K jumbo frames enabled. The Buffalo Terastation plot is JBOD mode and no jumbo frames. It is clear that the 5200 significantly outperforms the Synology and Buffalo products. All products display a downward trend in performance as file sizes increase, but the effect is more pronounced in the N5200—perhaps because performance is so high for small file sizes.

N5200 Write performance comparison - JBOD, RAID0 - 1 Gbps

Click to enlarge image

Figure 22: Write performance comparison - JBOD, RAID0 - 1 Gbps

The second set of charts shows shows RAID 5 performance, this time including results for the Infrant ReadyNAS NV. The NV wasn't included in previous plots because I have only RAID 5 data for it. The most up-to-date data I have was taken without jumbo frames enabled, which is what is shown in Figure 23.

Write performance comparison - RAID5 - 1 Gbps
Click to enlarge image

Figure 23: Write performance comparison - RAID5 - 1 Gbps

There is a lot going on here, so I'll point out some key points. First, the 5200, both with and without jumbo frames, once again outpaces the other products significantly. The "RAID5 build" plot line represents reduced performance when I ran a test during the 4 or so hours that the 5200 took to completely build a RAID 5 array.

The Synology CS402 and Infrant NV are the next best in performance. The CS406 outperforms the NV with smaller file sizes, but the NV does better on 128 MB and larger files, even without a boost from jumbo frames. Finally, the Buffalo Terastation brings up the rear, which can be expected given that it is the oldest design among the products compared.

The 5200 generally beats the crowd for read performance, but the story is a bit more interesting. Figure 24 shows JBOD and RAID 0 results the jumbo frames don't seem to help much. Performance is once again high for small file sizes, but only you get to 256 MB files, the 5200 drops much closer to the rest of the pack.

Click to enlarge image

Figure 24: Read performance comparison - JBOD, RAID0 - 1 Gbps

For RAID 5, Figure 25 once again includes the Infrant NV, which turns in an impressive performance much closer to the 5200, even without the benefit of jumbo frames. The NV's throughput vs. file size profile also more closely matches the 5200's than do the CS 406 or TeraStation.

Read performance comparison - RAID5 - 1 Gbps
Click to enlarge image

Figure 25: Read performance comparison - RAID5 - 1 Gbps

Those of you looking for RAID 1 results won't find them because I didn't run the tests. And with all those other wonderful RAID modes available, why would you want to use plain ol' RAID 1 anyway? (Just kidding.)

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