eMMC Module XU4 Linux
for
ODROID-XU4Pre-installed Ubuntu15.04 or latest version.
Ready to run out of the box
eMMC Version 5.0 interface or higher version from Toshiba or Sandisk.
JEDEC/MMCA version 5.0 : HS400 interface with 8bit DDR mode.
Schematics : http://dn.odroid.com/eMMCModule/
eMMC Module Reader is included
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 :
http://odroid.com/dokuwiki/doku.php?id=en:emmc_reference_chart
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!
 | Write command
sudo dd if=/dev/zero of=$(mount-path)/test oflag=direct bs=8M count=64
Read command
sudo dd if=$(mount-path)/test of=/dev/null iflag=direct bs=8M
| SD-class10 | SD-UHS1 | eMMC 5.0 | | Write speed (MB/s) | 8.5 | 10.8 | 39.3 | | Read speed (MB/s) | 18.9 | 35.9 | 140 |
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