Thank you so much for your response.
Thank god I was able to recover all the data.
Still I have problems when switching to RAID mode in BIOS (blue screen appears).
Now I'm trying to do some "magic" by Seagate SeaTools - maybe this will solve the problem
Quick specs.: Motherboard: ASUS P9X79 WS Windows 7 Ultimate x64, Sp1 1x SSD Samsung 840 PRO series - with OS on it; 2x Seagate Barracuda 7200 ST2000DM001-ER164 2000,3 GB connected as RAID0
Last night I had a serious problem with my RAID0 partition. I've turned computer right ...