On Tue, 20 Mar 2018 00:10+0700, Victor Sudakov wrote: > Besides, I don't know of a small simple boot manager (like boot0) for > GPT. Can you advise one? Try GRUB2 or rEFInd. My laptop is pretty happy about the latter. https://www.gnu.org/software/grub/ http://www.rodsbooks.com/refind/ -- Trond.