Assistance with raid configuration rs2wc0800

Hey guys, i have been running proxmox as my main server /firewall for almost a year, without any incident.
but then the sad thing happened, one of my disk died.

System:
Asus p8h77-m Pro - motherboard
i3-2100 cpu
12 gb ram.
4 in 0 pci slot intel nic.
disk in non raid


Now i want something a little more "data Secure" and i went out and ordered some disk to achieve something more secure.
because the software only raid on the motherboard don't work with proxmox. i bought a Intel rs2wc0800 raid controller (the card is based on LSI SAS9240-8i)

But i seems that my motherboard in combination with the newly purchased raid controller also fails.:(


I have tried multiple distros.
debian/ubuntu/proxmox/centos and every time the kernel loads it hangs (Init megasas)
i have also tried to install windows and it works with both arrays. when i install the driver

The weird thing is when i put the raid controller card in a old core2 duo machines, with another motherboard i works like a charm. and boots proxmox installation with both arrays.
i seems to me to be a kernel/motherboard/raid controller issue. I have read about this error and i seems that i am not the first to encounter it. but no one seems to have a solution.

http://forum.proxmox.com/threads/160...ID-megaproblem

https://forum.proxmox.com/threads/17...040-to-Proxmox


I Have Tried.

- Changing csm compatibility to regular bios. rather than UEFI
- Disabling the onboard storage controller
- Flashed the firmware to the newest version on both the motherboard and the raidcontroller
- Resetting the bios


Anyone have an idea how to fix this? help would be much appreciated.

This is a big cry for help :D