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Performance - more

In the new version of the NAS Ranker, you can filter products by testing method version (Revision 4 or 5) and Class (No RAID, RAID 1 or RAID 5). You can still sort by rank or by price (in ascending or descending order). This replaces the old version that filtered by number of drives and class of processor. While the class of processor is important, what you really want to know is how NASes perform compared to each other within RAID classes.


First, let's look at the RAID 1 class, which will include the AS5102T as well as other 2-bay NASes. I left the default Revision 5 Test Method (the current method) and generated a chart for Total NAS ranking. In the composite image below, this ranking is shown on the left and shows that the AS5102T has taken over as the top-ranked RAID 1 NAS from its AS5002T sibling, now ranked #2.

Being at the top of the charts means that there are no other NASes that match the filter with better performance at a lower price. To see how it stacks up to the competition, I also sorted by ascending price. Those results are shown on the right. There are quite a few 2-bay NASes that are cheaper than the $408 AS5104T, including the second cheapest, the #6 ranked ASUSTOR AS-202TE, the third cheapest, the #4 ranked ASUSTOR AS-302T, and the fourth cheapest, the #2 ranked ASUSTOR AS5002T.

TOTAL RAID 1 NAS Rank for by rank (left) and ascending price(right)

Total RAID 1 NAS Rank for by rank (left) and ascending price(right)

For comparison, I decided to include performance summaries for the #2 ranked ASUSTOR AS5002T, which is $100 less expensive than its top- ranked sibling, and the #3 ranked QNAP TS-253 Pro NAS. Though the QNAP TS-251 Pro was tied with the TS-253 and is quite a bit cheaper, I included the TS-253 Pro since, like the AS5102T, it has a quad-core Celeron processor.

The category results for the AS5102T and the AS5002T were very close and in the case of Read benchmarks, were tied with a #1 ranking. While the TS-253 Pro, like AS5004T had two category wins, its Total NAS ranking was pulled down by lower scores in Mixed Read Write, Backup and iSCSI.

Ranker Performance Summary comparison

Ranker Performance Summary comparison


Updated 2/24/15

Note: The pricing we used for the AS5104T was high. Correct current pricing on Amazon is $508, which puts it between the AS5004T and QNAP TS-453 Pro.

As with the RAID 1 rankings above, I used the NAS Ranker to filter for RAID 5 class products, which include the ASUSTOR AS5104T. In the composite image below, Total NAS ranking is shown on the left and the results, sorted by ascending price, are displayed on the right.

The results were somewhat different than the RAID 1 results above. The AS5104T grabbed the #2 ranking and trailed only the ASUSTOR AS7004 i3-based NAS that costs $433 almost twice as much. The ASUSTOR AS504T trailed at #5. Looking at the chart on the right, sorted by ascending price, the fifth-ranked ASUSTOR AS5004T looks like a good value as the fourth least expensive 4-bay NAS.

With a total of 18 RAID 5 products tested with the current Revision 5 method, there's significantly more competition than for 2-bay NASes. In addition to the AS5004T, ASUSTOR has two other products cheaper than the AS5104T, but both have Total NAS rankings that are poorer. The #13 ranked ASUSTOR AS-204TE is the second cheapest NAS and the #12 ranked ASUSTOR AS-304T is the third cheapest.

Total RAID 5 NAS Rank for by rank (left) and ascending price(right)

Total RAID 5 NAS Rank for by rank (left) and ascending price(right)

For RAID 5 performance comparison, I decided to include the #3 ranked QNAP TS-453 Pro NAS, which is $67 cheaper almost $100 more expensive than the AS5104T as well as the #5 ranked ASUSTOR AS5004T, which is $223 around $60 cheaper than the AS5104T. I was especially interested in the comparison between the two ASUSTOR products since the major hardware differences are the processors and the amount of memory.

Looking at the subcategories, the results were pretty much as expected. The AS5104T outperformed the AS5004T in every category but only by a small amount except for READ benchmarks, where the two tied. However, the QNAP TS-453 had better category rankings for Write, Read, and Mixed Read Write Benchmarks. The QNAP's Total NAS score was pulled down by lower category scores for Backup and iSCSI. In short, the AS5104 squeaked out its #2 Total NAS rank by 0.1 point. (2.7 vs. 2.8 for the QNAP TS-453)

Ranker Performance Summary comparison of the ASUSTOR AS5104T (l), the ASUSTOR AS5004T (c) and the QNAP TS-453 Pro Turbo NAS (r)

Ranker Performance Summary comparison of the ASUSTOR AS5104T (l), the ASUSTOR AS5004T (c) and the QNAP TS-453 Pro Turbo NAS (r)

Closing Thoughts

Updated 2/24/15

As I concluded in the previous review of the ASUSTOR 500XT products, the "5-series" NASes offer a significant improvement compared to ASUSTOR's 2-series and 3-series of NASes. However, the AS51XXT's offer only incremental performance improvement at higher prices compared to the AS50XXT family.

In evaluating the performance results, keep in mind that our test suite uses only a single client connected via one Gigabit Ethernet port. With so many products with similar values at the top of the charts, it's clear we're running into limitations of our test method for these higher end NASes that don't have 10GbE ports. You are more likely to reap full value of the incremental investment in an AS51XXT NAS when using multiple clients and dual aggregated Gigabit Ethernet ports.

That said, for 2-bay NASes, the ASUSTOR AS5102T and AS5002T hold the #1 and #2 (respectively) spots on the charts for Total NAS ranking. It's going to cost $100 more to buy the top-ranked NAS compared to its #2 sibling. If you prefer QNAP, the TS-251 Pro costs $37 more than the AS5002T and the TS-253 Pro costs $183 more. Since neither the AS5002T nor AS5102T have an LCD panel, the sweet spot for 2-bay NASes is the AS5002T.

The pricing spread between the AS5104T and the AS5004T is even a bit larger ~ $60. There are differences in processor and memory (which is upgradeable in both NASes) and the AS5104T features an LCD panel. But it's difficult to justify that much of a price difference based on the incremental performance differences we saw with our single-client test suite.

The QNAP TS-453 Pro, priced $67 cheaper around $100 more than the AS5104T, turned in excellent performance numbers and only faltered slightly in categories (backup and iSCSI) that might not be important to some buyers. In both the Read and Write benchmarks, the QNAP TS-453 Pro slightly outperformed both of the ASUSTOR 5-series NASes and was within 0.1 points—not a significant difference—of tying the AS5104T for Total NAS ranking

ASUSTOR has once again shown it can produce NASes with chart-topping performance at more affordable prices than its competition. For 2-bay NASes, the AS5002T, though slightly lower ranked, offers the best bang for the buck. For 4-bay NASes, the QNAP TS-453 Pro hits the sweet spot for price/performance followed closely by the AS5004T. For four-bay NASes the AS5004T hits the sweet spot for price / performance.

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