128GB eMMC Module XU4
* Get the eMMC Module Reader (sold separately $1.50)
eMMC Module XU4 Android & Linux
for ODROID-XU4 and ODROID-XU4Q
Pre-installed Android OS or Pre-installed Ubuntu OS
Ready to run out of the box
eMMC Version 5.0 interface or higher version.
JEDEC/MMCA version 5.0 : HS400 interface with 8bit DDR mode.
You need the above eMMC Module Reader to update the OS of the eMMC Module. Transcend USB multi-slot SD Card reader in the below picture is not included.
More about the eMMC Module : https://wiki.odroid.com/accessory/emmc/emmc
You can boot from a MicroSD card or an eMMC module. The MicroSD interface supports the higher performance UHS-1 mode as well.
File access of a 512MB file (read/write) on three different storage options shows distinct performance differences.
The eMMC 5.0 storage is ~7x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card is ~2x faster than the MicroSD Class-10 card in read tests. The MicroSD UHS-1 card provides a great low-cost option for many applications!
sudo dd if=/dev/zero of=$(mount-path)/test oflag=direct bs=8M count=64
sudo dd if=$(mount-path)/test of=/dev/null iflag=direct bs=8M