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Western Digital Red 6TB NAS HDD RAID Report

By: Tyler Bernath | RAID in Storage | Posted: Aug 19, 2014 2:12 pm

Power Consumption


Our custom power testing samples each drive for a period of three minutes, across each workload. In order to offer more granularity, we sample the power in one-second intervals.




Looking over our power consumption results, we found the 6TB WD Red to scale almost linear as each drive was added to the array.


In a single drive configuration, we found peak power consumption to reach around 5.5 watts, while two and three drive arrays touched just over 11 and 17 watts, respectively. Our four-drive array power consumption peaked at 24 watts during sequential write.



Final Thoughts




Back in April of this year, we had the chance to take four 4TB WD Reds and throw them together for a RAID report. In that report, we found those drives to peak around 550 MB/s in a RAID 0 array, while producing nearly 1100 IOPS in our 4K testing.


With each generation there tends to be performance improvements, and at the same time, tradeoffs for that performance. With the new WD Red 6TB, it is quite clear the firmware has been tuned for sequential performance over random read and write. With the last generation of Red, the 4TB we reached 1100 IOPS in our RAID 0 array, while this generation managed only 277 IOPS. Moving over to sequential, where we believe many performance efforts went with the latest solution, we found the Red 6TB reaching 689 MB/s over the 550 MB/s of the 4TB NAS solution, in a four-drive RAID 0 situation.


Another place where performance increased was power consumption. For instance, the 4TB Red in a four-drive RAID array peaked at 22.5 watts in sequential write testing back in April. Today, in our four-drive RAID 0 array with the 6TB solution, we found the drives to peak just below 24 watts. Additionally, if we move to the other side of the isle, the Seagate Desktop 6TB used 20 watts in a two-drive configuration when we tested them just a month ago.


Now, that's not to say Seagate won't make improvements if they do unveil a 6TB NAS solution, but if the 4TB NAS and Desktop kits told us anything, we know Seagate tunes their solutions for performance over power consumption.


Overall, I am quite surprised by the improvements WD has made with the purpose-built Red when it comes to performance, and at the same time also power consumption. After all, with the 6TB Red, the possibility to gain 30TB of storage capacity (RAID 0) in a five bay appliance, with minimal power impact, makes this solution top notch in my mind.

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