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 is one of the most sought-after performance specifications.
The Enterprise Capacity 2TB starts out with an impressive average of 212 IOPS at QD256, trailed by the ES.3 with 190 IOPS, and the 6TB Enterprise Capacity with 189 IOPS. The smaller platter provides a significant boost in average speed during the measurement window.
Our Latency vs IOPS charts compare the amount of performance attained from each solution at specific latency measurements. Many applications have specific latency requirements. These charts present relevant metrics in an easy-to-read manner for readers who are familiar with their application requirements. The HDDs that are lowest and furthest to the right exhibit the most desirable latency characteristics.
The 2TB Enterprise Capacity also delivers an enhanced latency profile during the measurement window.
The 2TB Enterprise Capacity leverages its smaller platters to deliver another impressive performance with an average of 246 IOPS at QD256. The 6TB 3.5" drive comes in second with 224 IOPS, and the ES.3 averages 205 IOPS.
The 2TB drive distances itself from the larger capacity drives in IOPS-v-latency measurements.
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 nimble 2.5" 2TB Enterprise Capacity offers robust performance that leads the test pool across the board.
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 Red's, and the Seagate NAS HDD. The higher-RPM drive will predictably feature higher power consumption.
The 2TB HDD only requires a miserly 4.11 watts during the test. This is much lower than the higher-capacity offerings, though the 6TB Enterprise Capacity offers a better watts-per-TB ratio.
We generate IOPS-to-watts measurements from data recorded during the test period. The 2TB drive is incredibly efficient with a chart-topping average of 59 IOPS-per-watt during the write workload, and 42 IOPS-per-watt during read activity.
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- Page 1 [Introduction]
- Page 2 [Enterprise Capacity 2.5 HDD 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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