WD Red 6TB HDD RAID 0 Performance Review


4.75GB Transfer

We have devised a method to test real-world performance via a scenario of a 4.75GB file transfer from my test bench SSD (Crucial MX200 250GB M.2 SSD) to the target device; the one on test at the time. The file itself contains a selection of music, multi-media files and word documents to give real world data; not synthetic files etc.

The test will be over the SATA3 (6GB/s) interface as this is the most commonly found on the latest motherboards/SATA compatible devices. So the test itself? Well, it involves transferring via drag and drop into the target drive from the test bench and the time taken will be divided by the amount of data giving us the average MB/s achieved. The lower the better of course!

4.75GB Transfer

Going from 1 drive to 2 in RAID 0 yields the biggest improvement with a 20-second jump. The same can’t be said between 2, 3 and 4 drives in RAID 0 however as only 6 seconds separates┬áthem. Still, going from single to RAID 0 with 2 drives will always offer near double performance due to the way the technology works.


  1. I believe WD’s “Red” series HDDs have a dynamic balancing feature in the main bearings.
    Also, when one of the drives in a RAID-0 array fails, it must be replaced and the
    entire array re-built: this is not much different from the steps that must be taken
    when a single “JBOD” HDD fails. We use a lot of RAID-0 arrays, for speed, and
    we LUV them! Lastly, in future reviews, you might want to mention the ratio
    of (price) / (warranty years). Most often, the 5-year warranties excel on this metric.

  2. Why? Why only synthetic, worthless benchmarks? Of course 2 disks in RAID0 are going to have 2 times everything! We don’t need benchmarks to prove it, logic proves it!

    Why can’t there be one benchmark on the whole Internet, of HDD RAID0 vs no RAID testing real-world scenarios, with a RAID controller (and comparing hardware and software controllers)? And by real-world I don’t mean copying speed as that’s as obvious as synthetic benchmark results.

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