The WD My Cloud EX2 topped out at 95 MB/s read and 64 MB/s write. These aren’t the fastest speeds that we have ever seed, but not bad for a NAS that is powered by the Marvell A370 SoC with 512MB of DDR3 memory.
ATTO showed that we were getting very respectable speeds of 98.4 MB/s read and 69.9MB/s write.
Rather than relying on synthetic benchmarks alone, we also used Teracopy and dragged and dropped a folder with 81 pictures and .MOV video clips from a recent retirement party and a few edited site images. The entire folder was 6.63GB in size and is the perfect real world test for the My Cloud EX2 as everyone backs up their pictures and movies. When copying the pictures from our desktop through our Gigabit LAN (powered by the ASUS RT-AC66U Gigabit Router) to the My Cloud EX2 we averaged 34 MB/s. It tool 197.627 seconds to copy the 6.63GB folder to the 2-bay NAS.
When copying the folder from the NAS back to a new location on our desktop PC we found that it took 106.13 seconds at 64MB/s.