128k Sequential Read/Write
We write to every LBA on both drives to highlight performance degradation from the outer to inner tracks of both drives. The drives begin with much higher speed on the outer tracks, 180 MB/s for the HGST Ultrastar He6 and 171 MB/s for the 7K4000. As we move to the inner tracks, the He6 falls to a low average of 86 MB/s, and the 7K4000 falls to 93 MB/s. The 7K4000 finishes its pass over its 4TB in 7.5 hours, and the He6 requires 11.5 hours to write the entire 6TB of data.
128k sequential speed reflects the maximum sequential throughput of the HDD. The He6 takes the lead in sequential read activity with an average of 179 MB/s. The 7K4000 lags behind with an average of 172 MB/s.
The He6 provides lower latency across the board with sequential read activity.
The He6 maintains its lead in sequential workloads with an average of 179 MB/s compared to 172 MB/s from the 7K4000.
The He6 also handles mixed workloads well as it continues to best the 7K4000 in sequential speed measurements.
The He6 averages 7.46 watts, much lower than the 8.72-watt average from the 7K4000.
The He6 delivers a commanding lead in sequential workload efficiency.