ADM 2.3.1.R1K3 firmware was loaded onto an AS5004T and performance tests were run using the Revision 5 NAS test process. Since the AS5002T uses the same processor, RAM and Ethernet components, all testing was done on the AS5004T. The AS5004T tests used four drives configured in single RAID 0, 5 and 10 volumes. The AS5002T tests used two drives in single RAID 0 and 1 volumes. All tests were run using our estern Digital Red 3 TB (WD30EFRX) drives provided by WD.
Normally, the first chart that I look at when evaluating NAS performance is the default NAS Chart that looks at File Copy Write Performance. I filter for the number of drives and the latest test method (black bars) and see where the NAS being currently reviewed appears.
The composite image below shows how the AS5002T (left) and the AS 5004T (right) compare to other products matching the filters. Both of the ASUSTOR AS500XT tests turned in virtually identical scores of ~ 110 MBps and ranked near the top of the charts. File Copy Read performance was similar, at 106.4 MB/s (AS5002T) and 107.7 MB/s (AS5004T) and both ranked near the top of the charts for their filtered products.
ASUSTOR AS5002T (left) and AS 5004T (right) file copy write performance ranking filter for number of drives and test method
Next, I look at the Benchmark Summary, which shows all test results for each product. In the composite image below, you'll note that for both the AS5002T (left) an the AS5004T (right), the results are remarkably consistent. There was really very little difference in the File Copy Write and File Copy Read numbers for any tested RAID level for either set of tests run. Many tests, including USB3.0 and eSATA attached backup tests, are well above 100 MB/s.
ASUSTOR AS5002T (left) and AS 5004T (right) benchmark summaries
The NAS Ranker really does all of the hard work of comparing NAS performance tests, weighing results by test category and coming up with a Total NAS ranking. The NAS Ranker has recently been updated and simplified. In the new version, you can filter products by test method version (Revision 4 or 5) and Class (No RAID, Raid1 or RAID5). You can still sort by rank or by price (in ascending or descending order).
RAID 1 Class NAS Ranking
First, let's look at the RAID1 class, which includes the AS5002T as well as other 2-bay NASes. I filtered for Test method Revision 5 (the current process) and generated a chart for Total NAS ranking. In the composite image below, this ranking is shown on the left and shows the AS5002T is the top ranked RAID1 NAS. 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.
The AS5002T really delivers the "bang for the buck". To see how it stacks up to the competition, I also sorted by ascending price. Those results are shown on the right. The #8, #6 and #4 ranked NASes are cheaper, and two of the cheaper ones are the ASUSTOR AS-202TE (#6) and ASUSTOR AS-302T (#4).
TOTAL NAS Rank for RAID 1
For comparison, I decided to include performance summaries for the #2 ranked QNAP TS-251 Turbo NAS, which is only $4 more expensive and the #4 ranked ASUSTOR AS-302T, which is $7 cheaper than the AS5002T. For this comparison, the AS5002T had four #1 category wins (Total NAS, Read Benchmarks, Backup and iSCSI). The QNAP TS251 and one #1 category win for mixed Read Write, just edging out the ASUSTOR AS52002T by placing #2 for Read Benchmarks.