$ sudo grub-install -v
grub-install (GRUB) 2.00-7ubuntu11
$ sudo grub-install /dev/sda3
/usr/sbin/grub-bios-setup: warning: File system `ext2' doesn't support embedding.
/usr/sbin/grub-bios-setup: warning: Embedding is not possible. GRUB can only be installed in this setup by using blocklists. However, blocklists are UNRELIABLE and their use is discouraged..
/usr/sbin/grub-bios-setup: error: will not proceed with blocklists.
making a dedicated partition for grub...