MiniPC with Ubuntu, USB 3.0 works like USB 2.0, what could be the reason?

Question

Debian

Hello! I got a single-platter odroid here the other day. In the same place on the manufacturer's website, I downloaded ubuntu 14.04, everything works, except for the USB 3.0 ports in the correct mode.
The board has full-fledged 3.0 ports, with a high write speed, as they say on the forum (up to 50 mb / s).
I connect external HDD 3.0 a case, I push there a disk. I connect to the board iiii... tests with DD do not give out a speed higher than 15 Mb / s ...
The same case works fine on Windows, the speeds there reach 40 Mb / s.
What could be the problem? Googled, they write that the driver for a specific external case may not be added to the OS assembly. How can I check and fix this?

Answer 1

By testing writing over NTFS, you are testing CPU performance, not USB or disk performance.
Work directly with a block device - get the speed of a block device.
(Just in case - existing data will be overwritten)
Or at least over something native: ext4, xfs.
btrfs, I remember, is also a very CPU-intensive load.