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WD Red 6TB NAS Enterprise HDD Review

By: Paul Alcorn | HDDs in IT/Datacenter | Posted: Oct 7, 2014 1:06 pm
TweakTown Rating: 95%Manufacturer: WD

4k Random Read/Write




Each level tested includes 300 data points (five minutes of one second reports) to illustrate performance variability. The line for each queue depth represents the average speed reported during the five-minute interval. 4K random speed measurements are an important metric when comparing drive performance, as the hardest type of file access for any storage solution to master is small-file random. 4K random performance is a heavily marketed figure, and one of the most sought-after performance specifications.


It is important to note that the 6TB Red features NASware 3.0, and the 4TB Red utilizes previous-generation NASware 2.0. The 6TB Red squeezes by the 4TB version with an average of 139 IOPS at QD256. The WD Red Pro leads the chart with 163 IOPS at QD256, the original 4TB WD Red scores 136 IOPS, and the Seagate NAS HDD provides 99 IOPS.




The two Red drives are very close in latency performance during the measurement window.




The 6TB WD Red averages 146 IOPS at QD256, the WD Red Pro averages 192 IOPS, the 4TB WD Red provides 147 IOPS, and the Seagate NAS HDD provides 116 IOPS at QD256. The increased speed of the 7,200 RPM WD Red Pro is apparent in heavy random workloads, and the two client-oriented Red's continue to operate within very similar performance envelopes.






Our write percentage testing illustrates the varying performance of each solution with mixed workloads. The 100% column to the right is a pure write workload of the 4k file size, and 0% represents a pure 4k read workload.


The 4TB and 6TB Reds continue to provide faster performance than the other 5,400-RPM NAS HDD in the test pool.




We record power consumption measurements during our test run at QD256. It is important to note the difference in RPM between the WD Red Pro at 7,200 RPM, in comparison to the lower RPMs featured in the 4TB and 6TB WD Reds and the Seagate NAS HDD. The higher-RPM drive will predictably feature higher power consumption.


The 6TB Red requires an amazingly miserly 5.13 watts, while the WD Red Pro draws 10.26 watts, the 4TB WD Red averages 5.48 watts, and the Seagate NAS HDD requires 5.63 watts.






We generate IOPS-to-watts measurements from data recorded during the test period. The 6TB WD Red provides 28 IOPS-per-watt during the write workload and 21 IOPS-per-watt during the read workload. The client-oriented Reds are amazingly efficient in this workload.

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