USER@USER-Aspire-7540:~$ sudo grub-install /dev/sda
/usr/sbin/grub-bios-setup: warning: this msdos-style partition label has no post-MBR gap; embedding won't be possible.
/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.
USER@USER-Aspire-7540:~$