Installing Proxmox on Supermicro X10SLH-F-B and configure it with Synology as Storage

Re: Installing Proxmox on Supermicro X10SLH-F-B and configure it with Synology as Sto

The first Issue i had is, that when i put my two ssd's together to raid1 at bios, the proxmox setup doesn't find the new raid drive.

Is it because of "SW-Raid" at the board, what can i do, that i can use the ssd in raid1 mode?