[lubuntu] Can't boot UEFI Lubuntu installed on sm951 AHCI with SATA=RAID

I have a Z170-HD3P MB with 2x4G 3000 DDR4 memory, a Samsung 128G 951 AHCI M.2 drive and 2 WD 500G HDD.
On the UEFI BIOS; OS is set to Other, and boot options and other drives are set UEFI Only.
With the two WD 500G HDD, I’ve created a RAID 0 array to use as drive D:, so I’d also set SATA to RAID on the UEFI BIOS.

During Windows 7 installation, after loading SATA, AHCI, RAID and USB 3 chipset drives, I partitioned the 951 AHCI M.2 drive for Windows (EFI, MS reserved and for C and left two other partitions for Lubuntu (EXT4 and Swap). During Windows 7 installation I moved the users folder to drive D:, (RAID 0 array). Windows 7 is working well.

When I tried to install Lubuntu 16.04 using a USB UEFI pendrive it couldn't "see" my 951 AHCI M.2 drive.
So I tried another approach. After detaching the two WD 500G HDD (now on a RAID 0 array), I’ve set SATA to AHCI on the UEFI BIOS.
After booting Lubuntu using the USB UEFI pendrive it could see" my 951 AHCI M.2 drive and I've installed Lubuntu without problems.
The problem is that it ONLY works with SATA = AHCI on the UEFI BIOS. With SATA = RAID it loads Grub but doesn’t boot, I guess because GRUB doesn't see my 951 AHCI M.2 drive when SATA = RAID.
With SATA = AHCI, I’ve booted Lubuntu and installed Dmraid, but it didn’t help.

My question for the Linux experts:
As I need to have SATA = RAID so the two WD 500G HDD (now on a RAID 0 array) be able to work, what I have to do on Lubuntu to get it working with the UEFI BIOS:
- OS set to Other.
- Boot options and other drives set to UEFI only.
- SATA set to RAID.

EasyUEFI (in Windows) shows that I have two options to boot Lubuntu:
- File path:EFIUBUNTUSHIMX64.EFI
- File path:EFIUBUNTUGRUBX64.EFI
With one should be used?

If someone has the answers, please explain in a maer that a non-Linux expert can understand and apply. Thank you.