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 Seagate Enterprise Performance V.6 averages 414 IOPS at QD256, falling into the gap between the 15,000 RPM Toshiba and 7,200 RPM, as expected.
The 15,000 RPM Toshiba leads with random writing, though the Seagate V.6 falls within expectations at 368 IOPS at QD256.
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 Seagate V.6 follows a predictable curve as we mix in write activity, but does not lose much performance compared to the pure read workload.
The Seagate Enterprise Performance V.6 provides 81,584 I/O's (74.82%) at 80-100ms, 19,842 I/O's (18.18%) in the 60-80ms range, and 7,604 I/O's (6.97%) at 100-200ms.
We record the power consumption measurements during our test run at QD256. The Seagate V.6 matches the much higher RPM Toshiba 15K in power consumption at 6.16 Watts.
IOPS to Watts measurements are generated from data recorded during our test. The Seagate V.6 delivers an average of 59 IOPS per watt for 4K random writes, and 62 IOPS per Watt for 4K random read.