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 NAS HDD doesn't score as well as the WD Red in the random write test, scoring an average of 116 IOPS at QD256. The WD Red averages 147 IOPS in the 4K random write test.
The Seagate NAS HDD averages 103 IOPS, while the Red averages 136 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 NAS HDD falls into the expected lower performance profile, but maintains a very tight performance profile. The WD Red is faster with random access, yet has variable performance across the board.
The Seagate HDD delivers 100% of its I/O in the 200-400ms range, while the Red delivers 79.1% of I/O's in the 200-400ms range, and 20.8% at 100-200ms.
We record the power consumption measurements during our test run at QD256.
The Seagate averages 4.76 Watts, less than the Red, which averages 5.48 Watts during the measurement window.
IOPS to Watts measurements are generated from data recorded during our test. The Seagate delivers an average of 31.4 IOPS per Watt for 4K random writes, and 26.4 IOPS per Watt for 4K random read access.
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- Page 1 [Introduction]
- Page 2 [Seagate NAS HDD Specifications]
- Page 3 [Seagate NAS HDD Internals]
- Page 4 [Test System and Methodology]
- Page 5 [4K Random Read/Write]
- Page 6 [128K Sequential Read/Write]
- Page 7 [Database/OLTP and Fileserver]
- Page 8 [Emailserver and Webserver]
- Page 9 [Final Thoughts]
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