4K Random Read/Write
Each QD for every parameter tested includes 300 data points (five minutes of one second reports) to illustrate the degree of performance variability. The line for each QD 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. One of the most sought-after performance specifications, 4K random performance is a heavily marketed figure.
The Constellation ES.3 leads the pack easily with an average of 190 IOPS at QD256.
The ES.3 falls into a slightly higher performance envelope than the competing solutions and with less variability, averaging 205 IOPS at QD256 in our 4K write testing. The Western Digital SE trails closely behind with an average of 198 IOPS.
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 Constellation ES.3 outperforms the other HDD's in this test, and exhibits excellent speed in the read heavy percentages.
The Constellation ES.3 edges out the other competitors with the best latency, providing 59,892 I/O's (98%) at 100-200ms, and the remaining 1219 I/O's (1.99%) in the 200-400ms range.
We record the power consumption measurements during our test run at QD256. The Constellation ES.3 averages 8.84 Watts, well below the Toshiba offering.
IOPS to Watts measurements are generated from data recorded during our test. The Constellation ES.3 delivers an average of 26 IOPS per Watt for 4K random writes, and 24 IOPS per Watt for 4K random read access.
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