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

WD Red 4TB NAS HDD Enterprise Review
The latest generation of WD Red NAS HDDs offer an increase to 4TB in the 3.5-inch form factor with features tailored specifically for NAS users.
By: | HDDs in IT/Datacenter | Posted: Sep 7, 2013 2:03 am
TweakTown Rating: 92%Manufacturer: WD

128K Sequential Read/Write

 

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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.

 

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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.

 

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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.

 

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

 

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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.

 

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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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