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WD Red 6TB NAS Enterprise HDD Review

By: Paul Alcorn | HDDs in IT/Datacenter | Posted: Oct 7, 2014 1:06 pm
TweakTown Rating: 95%Manufacturer: WD

128k Sequential Read/Write

 

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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 7.5 hours to write the entirety of the capacity of the 4TB WD Red Pro drive, and 13.5 hours for the 6TB Red. A sequential read test following the same methodology results in nearly identical results.

 

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128k sequential speed reflects the maximum sequential throughput of the SSD, 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 WD Red Pro leads the test with 171 MB/s at QD256, but the 6TB Red is close on its heels with an average of 162 MB/s. The 4TB WD Red offers the lowest sequential read speed with 139 MB/s; the Seagate NAS HDD provides a staggered performance profile with an average of 163 MB/s at QD256.

 

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The WD Red Pro offers the best overall latency during heavier workloads, but under light workloads, the 6TB Red is incredibly competitive with its 7,200-RPM counterpart.

 

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Sequential write performance is important in tasks such as caching, replication, HPC, and database logging. The WD Red Pro provides a leading 170 MB/s at QD256, but once again, the 6TB Red isn't far behind with its average of 162 MB/s. The 4TB WD Red provides 139 MB/s, and the Seagate NAS HDD provides 162 MB/s.

 

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The 6TB WD Red handily outperforms the 4TB version in mixed sequential workloads.

 

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The 6TB WD Red averages 5.82 watts.

 

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The 6TB WD Red offers 27 MB/s for read, and 27 write MB/s-per-watt.

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