I have the 8GB and 32GB of these EMMC 5.0 modules. I couldn’t get them to work on my XU4 .
I even tried using one with the MicroSD adapter on a Raspberry Pi (you never know if you dont try lol), turns out, that didn’t work either .
Either way, let us know if your EMMC works in the XU4.
DietPi-Config has a filesystem Read/Write performance test for EMMC/SD (root filesystem “/” is used). Simply goto dietpi-config > tools.
Another test from Odroid’s site:
To obtain the results in the storage I/O comparison graph, type the following lines at a command prompt.
Write speed command :
$ dd if=/dev/zero of=test.tmp oflag=direct bs=8M count=64
Read speed command :
$ dd if=test.tmp of=/dev/null iflag=direct bs=8M count=64