Actually, I don't really know differences between. Just all guides use cfdisk and I forgot about mbr and gpt. But I changed mbr to gpt using gdisk(after start he say, that I have mbr and gpt and which I want to use. I chose "create blank gpt" and now I can use gdisk to partition disk. And after gdisk lsblk show right information!
Thats it
! thank you, but maybe you can tell me, how can I do it on a live system, please?