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 they work inward. The small platter sizes allow the drives to write the entire platter very quickly. Both Seagate Enterprise Performance 15K models manage to top 250MB/s on the outer edge of the platter. The TurboBoost model delivers slightly less performance variation.
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 used increasingly for sequential workloads as SSDs encroach upon the application space.
The Enterprise Performance 15K v5 drive averages an impressive 252 MB/s during the sequential read workload at QD256, and the TurboBoost model delivers identical performance.
Both models fall within a similar performance profile during the test.
Sequential write performance is important in tasks such as caching, replication, HPC, and database logging. The standard Enterprise Performance 15K averages an impressive 252 MB/s, and the TurboBoost model provides 251 MB/s.
The results are nearly identical in this round of sequential testing as well.
The mixed-workload sequential testing is one of our most demanding tests. Many drives will fare very well on the high-end, but fall short with mixed sequential activity. The reduced variability of TurboBoost model is on display during this test, though the standard model ekes out a win in the 30-70% range.
The TurboBoost model displays significantly lower sequential power draw during the measurement window.
The TurboBoost's lower sequential power requirements leads to higher MB/s-to-watts measurements.
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