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.
The WD Red Pro leads the chart with 163 IOPS at QD256, and the WD SE comes in second with 156 IOPS. The original WD Red scores 136 IOPS, and the Seagate NAS HDD provides 99 IOPS.
The similarities between the WD SE and WD Red Pro are apparent in their close latency grouping. The Seagate NAS lags behind in latency performance.
The WD Red Pro averages 192 IOPS; the WD SE takes a slight lead with 198 IOPS; the 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 and WD SE is apparent in heavy random workloads.
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 WD Red Pro and the WD SE trade blows during the test, but easily outpace the slower competitors.
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 and SE at 7,200 RPM, in comparison to the lower RPM featured in the WD Red and the Seagate NAS HDD. The higher-RPM drives will predictably feature higher power consumption.
The WD Red Pro draws 10.26 watts, the WD SE requires 8.65 watts, the 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 WD Red Pro provides 18 IOPS-per-watt during the write workload, and 13 IOPS-per-watt during the read workload. The higher power consumption isn't entirely offset by the increased performance. The SE manages to remain impressively efficient.
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- Page 1 [Introduction]
- Page 2 [WD Red Pro Internals and Specifications]
- Page 3 [Test System and Methodology]
- Page 4 [Benchmarks - 4k Random Read/Write]
- Page 5 [Benchmarks - 8k Random Read/Write]
- Page 6 [Benchmarks - 128k Sequential Read/Write]
- Page 7 [Benchmarks - Database/OLTP and File Server]
- Page 8 [Benchmarks - Email Server]
- Page 9 [Final Thoughts]
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