Hardware RAID controller with ZFS again

Hello
I have MCloud server and all of the 8 nodes with Hardware controllers, yesterday, I tried to install RAID 0 with ZFS in the top of RAID1 with 4TB micron 4300 ,
the performance was crazy and this was the first time to got this result.

root@s2219:~# dd if=/dev/zero of=tempfile bs=1M count=1024; sync
1024+0 records in
1024+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.302078 s, 3.6 GB/s
root@s2219:~# dd if=/dev/zero of=tempfile bs=1M count=1024; sync
^[[A1024+0 records in...

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