Im using the exact same RAID card you would be there too.
My problem is i can install the OS, then i goto reboot, and nufin, first time i did it i installed on one drive, then made the image from that, per the instructions in the tx2 manual, but i got a kernel panic.
Then i reformatted the drives, and reinstalled as a mirror RAID, and now that all comes up is the letters LI after reebot.