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Seagate 6TB Enterprise Capacity 3.5 HDD v4 Review

By: Paul Alcorn | HDDs in IT/Datacenter | Posted: May 7, 2014 8:05 pm
TweakTown Rating: 94%Manufacturer: Seagate

128k Sequential Read/Write




We write to every LBA on both drives to highlight performance degradation from the outer to inner tracks of the drives. The drives begin with much higher speed on the outer tracks: 215 MB/s for the Seagate Enterprise Capacity v4, 180 MB/s for the HGST Ultrastar He6, and 171 MB/s for the 7K4000. As we move to the inner tracks, the Seagate v4 averages 109 MB/s, the He6 falls to a low average of 86 MB/s, and the 7K4000 falls to 93 MB/s. Even at the innermost tracks, the v4 retains a commanding sequential write performance advantage over the competing drives.


The He6 requires 11.5 hours to write the entire 6TB of data, but the Seagate v4 is considerably faster, completing the task in 9.5 hours. The 7K4000 finishes its pass over its smaller 4TB capacity the fastest, taking just 7.5 hours.




128k sequential speed reflects the maximum sequential throughput of the HDD. The Seagate v4 wins easily with an average of 192 MB/s and exhibits a tight performance profile. The He6 follows with an average of 156 MB/s, and the 7K4000 averages 157 MB/s.




The Seagate v4 provides lower latency across the board with sequential read activity.




The Seagate v4 leads with an average of 192 MB/s, and the He6 averages 156 MB/s compared to 157 MB/s from the 7K4000.






The Seagate v4 dominates the mixed sequential testing, easily running away with the win in every category.




The Seagate v4 averages 9.67 watts, the He6 averages a flat 7 watts, and the 7K4000 averages 8.4 watts.








The Seagate v4 benefits from its much higher sequential performance to squeeze past the 7K4000 in write efficiency, and it widens the gap in read efficiency.

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