16GB SD Card for HC1/2 and XU4
16GB Micro SD Card for XU4 or HC1/2
MicroSD UHS-1 XU4 Linux
SD / eMMC PERFORMANCE
You can boot from a MicroSD card or an eMMC module. The MicroSD interface supports the higher performance UHS-1 mode as well.
File access of a 512MB file (read / write) on three different storage options shows distinct performance differences.
The eMMC 5.0 storage is ~ 7x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card is ~ 2x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card provides a great low-cost option for many applications!
sudo dd if = / dev / zero of = $ (mount-path) / test oflag = direct bs = 8M count = 64
sudo dd if = = direct bs = 8M