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WD Red 4TB NAS HDD Enterprise Review - 128K Sequential Read/Write

By: Paul Alcorn | HDDs in IT/Datacenter | Posted: Sep 7, 2013 2:03 am
TweakTown Rating: 92%Manufacturer: WD

128K Sequential Read/Write




The 128K sequential speeds reflect the maximum sequential throughput of the HDD using a file size encountered in a normal NAS usage.


The Red averages 139 MB/s at QD256. There is a clear segmentation here, with the two 7,200 RPM drives providing incrementally faster write speed.




The Red averages 139 MB/s in sequential write speed during the measurement window, but again the two 7,200 RPM drives offer the same performance with a sequential workload.




The Red posts excellent performance in our mixed read/write testing, nearly matching the Re and Se. The Red lags behind in pure read and write workloads, but in the middle ground, it performs very well.




The Red offers up 99.9% of requests in the 20-40ms range, matching the faster HDDs in our sequential latency test.




The Red averages 5.34 Watts during sequential write testing, providing a much lower power consumption figure than the competing drives. Considering the excellent performance in mixed workloads and write latency this low power consumption is a huge bonus.






The Red provides a dominating IOPS to Watt ratio in both sequential read and write workloads, surprisingly besting both enterprise-class HDDs, which are designed with power efficiency as a major focal point. The Red provides an average of 25.6 MB/s per Watt for 128K sequential read/write.

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