Yesterday, the Xiaomi Black Shark 4 and Black Shark 4 Pro smartphones were presented, which, among other things, stand out with an unusual storage subsystem consisting of a RAID array, including UFS 3.1 flash memory and SSD.

According to Xiaomi’s data, such a configuration should increase the read and write speed by 69%. What is in reality?

As you can see, the speeds are really impressive. Modern flagship smartphones with UFS 3.0 / 3.1 flash typically show sequential read and write speeds of 1400-1700 MB / s and 650-750 MB / s, respectively, while random read and write rates are in the 220-260 MB / s range. … The Galaxy S21 Ultra has higher performance, but still, in the end, they are significantly inferior to what the new Xiaomi demonstrates.
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