BTRFS support takes a larger disk space, so you either must leave a couple (say 4) MB of free space between the start of he disk and first partition, or create a small "BIOS GRUB" partition there (that you don't mount or otherwise use, grub will take care of it).
BTRFS support takes a larger disk space, so you either must leave a couple (say 4) MB of free space between the start of he disk and first partition, or create a small "BIOS GRUB" partition there (that you don't mount or otherwise use, grub will take care of it).