This wiki page shows cloudshell2 performance.

RAID0, RAID1, SPAN, and PM mode separately thereby set the mode switch on the cloudshell2 board and added a test condition installed software RAID mdadm in the JBOD(PM) to compare with hardware RAID and software RAID.

Hardware

• CloudShell2
• 3.5“ 4TB WD Red NAS HDD x 2

Software

• Ubuntu ( Kernel : Linux odroid 4.9.28-38 ) : Samba, dd(data dump) command
• HELIOS LanTest utility
• Software setting followed by here

Watch this result out, HELIOS LanTest shows RAID 0 mode is the similar performance with RAID 0 of HW or SW. However,
In general, the result shows that hardware RAID is about more than 10% faster than software RAID mdadm.

root@odroid:/media/hdd# dd if=./urandom.test of=/dev/null iflag=direct bs=8M
384+0 records in
384+0 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 17.889 s, 180 MB/s

root@odroid:/media/hdd# dd if=./urandom.test of=/dev/null iflag=direct bs=8M
384+0 records in
384+0 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 21.7006 s, 148 MB/s

root@odroid:/media/hdd# dd if=./urandom.test of=/dev/null iflag=direct bs=8M
384+0 records in
384+0 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 20.1366 s, 160 MB/s

root@odroid:/media/hdd2# dd if=./urandom.test of=/dev/null iflag=direct bs=8M
384+0 records in
384+0 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 17.8035 s, 181 MB/s

root@odroid:/media/hdd# dd if=./urandom.test of=/dev/null iflag=direct bs=8M
384+0 records in
384+0 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 23.8105 s, 135 MB/s

root@odroid:/media/hdd# dd if=./urandom.test of=/dev/null iflag=direct bs=8M
384+0 records in
384+0 records out
3221225472 bytes (3.2 GB, 3.0 GiB) copied, 48.9907 s, 65.8 MB/s

Additional performance test with LVM2 for easier storage upgrade in the future by crazyquark at https://forum.odroid.com/viewtopic.php?f=147&t=27679
Thank you crazyquark