128k Sequential Read/Write
We write to every LBA to highlight performance degradation from the outer to inner tracks of the drive. The drives begin with much higher speed on the outer tracks, and lose speed as it works inward. It required 9.7 hours to write the entire capacity of the 3.5" 6TB Enterprise Capacity drive, and 5.2 hours for the 2TB variant.
128k sequential speed reflects the maximum sequential throughput of the HDD, and is indicative of performance in OLAP, batch processing, streaming, content delivery applications, and backup scenarios. Today's HDDs are increasingly used for sequential workloads as SSDs encroach upon the application space.
The 2TB drive has an advantage in random workloads, but during the sequential read workload, it lags behind the competitors with an average of 131 MB/s at QD256. The 6TB version tops the chart with an outstanding 215 MB/s, and the previous-gen ES.3 offers 178 MB/s.
The faster sequential performance of the 6TB version equates to much lower latency during the test.
Sequential write performance is important in tasks such as caching, replication, HPC, and database logging. The 2TB drive averages 130 MB/s, well below the 213 MB/s for the 6TB version, and 175 MB/s for the 4TB ES.3.
The 6TB Enterprise Capacity delivers the best IOPS-v-Latency performance.
The 2TB Enterprise Capacity manages to best the ES.3 during the mixed sequential testing, but lags behind its larger 6TB counterpart.
The 2TB Enterprise Capacity averages a mere 3.88 watts.
The 2TB Enterprise Capacity still manages to offer incredible efficiency in spite of the slower performance, with an impressive average of 33 MB/s for read, and 32 MB/s-per-watt for write.
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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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