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NAS Reviews

Performance - Ranking

For our ranker comparison, we decided to compare the TS-x5's with QNAP D2700 Atom-based NASes. For the two bay comparison, we compared the TS-251 to the TS-269 Pro. For the four bay comparison, we compared the TS-451 to the TS-469L. The chart below summarizes the CPU, RAM and flash for each product.

  TS-251 TS-469L TS-269 Pro
CPU Intel Celeron J1800 dual core processor @ 2.41 GHz (Bay Trail D) Intel D2700 @ 2.13 GHz Intel D2700 @ 2.13 GHz
RAM 1 GB 1 GB 1 GB
Flash 512 MB 512 MB 512 MB
Table 2: Key component summary and comparison

Using the NAS Ranker, I filtered for two drives and did not add an additional processor class filter. Interestingly, the TS-269 Pro and the TS-251 were tied with a #2 ranking out of 29 2 bay NASes.

NAS ranker for two bay NASes - Total NAS

NAS ranker for two bay NASes - Total NAS

The composite chart below shows individual results for each product. The TS-269 Pro had category wins for Write Benchmarks, Read Benchmarks and Mixed Read Write benchmarks. The TS-251 prevailed in the other three categories. The write benchmarks appeared to be dragged down by relatively low NASPT Directory Copy to NAS performance. Similarly, for Read Benchmarks, the NASPT Directory Copy From NAS dragged down otherwise good performance.

Ranker detail for QNAP's TS-251 and TS-269 Pro

Ranker detail for QNAP's TS-251 and TS-269 Pro

Filtering for four drives showed some surprisingly interesting rankings. The TS-451 was in a three-way tie for third place (out of 24 four-bay NASes) with the TS-469L and ASUSTOR AS-604T. All three products ranked slightly behind the Synology DS412+ Disk Station that is also Atom D2700-powered.

NAS ranker for two bay NASes - Total NAS

NAS ranker for two bay NASes - Total NAS

Comparing Performance Summaries for the two QNAPs shows the D2700-based TS-469L outperformed the TS-451 in both write and read benchmarks. NASPT Directory Copy to NAS and NASPT RAID 10 Directory Copy to NAS pulled down the the overall Write Benchmarks. For Read benchmarks, various NASPT results dragged down the category score. As with the TS-251, the TS-451 scored well for Video, Backup and iSCSI.

Ranker detail for QNAP's TS-451 and TS-469L

Ranker detail for QNAP's TS-451 and TS-469L

Closing Thoughts

There's no question that the TS-251 and TS-451 are high-performance NASes capable of large sequential file reads and writes of over 100 MB/s. But it's not clear that the switch to Intel's Bay Trail processor provides a price / performance point that you can't already get with existing QNAP models.

For a two bay NAS, it's a toss-up between the TS-251 and the almost two year old TS-269 Pro. Both are equally ranked for Total NAS performance and are similarly priced. On Amazon, the TS-251 is currently listed for $499.00 while the TS-269 Pro sells for $501.99.

If you're looking at four-bays, the TS-451 tied the older TS-469L for Total NAS ranking. But the TS-451's price could very well tip you toward the older product. The TS-451 is currently selling on Amazon for almost $700 (!), while the TS-469L is considerably less at around $550 (the ASUSTOR AS-604T is $542). For very similar performance, the $149 premium on the TS-451 seems like a steep price to pay for the ability to upgrade RAM to 8 GB.

In the end, the value-add in the TS-X51's may be more in their expandable memory and hardware transcoding (when QNAP sorts out the ease-of-use issues) looking toward Virtualization and PC-replacement applications than in mundane file reading and writing. But if Virtualization and PC replacement are what you're thinking of, you might want to spend even more for the also-newly-released and even spendier TS-X53 Pro's. We'll soon be looking at those, too.

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