On Sat, 2 Mar 2019 at 16:06:51 -0500
Hendrik Boom <hendrik@???> wrote:

> Currently booting from a 750G BIOS-partitioned disk.
> Trying to enable booting from the 4.7T drive, which is GPT
> partitioned.
>
> With grub-install I get errors:
>
> april:/farhome/hendrik# grub-install /dev/sda
> Installing for i386-pc platform.
> grub-install: warning: this GPT partition label contains no BIOS Boot
> Partition; embedding won't be possible. grub-install: error:
> embedding is not possible, but this is required for RAID and LVM
> install. april:/farhome/hendrik#
>
> Evidently there is some kind of incompatibility here.
>
> What is going on? What can I to do other than continuing to boot
> from small BIOS disks?

See if this helps you:

https://askubuntu.com/questions/671809/grub-install-this-gpt-partition-label-contains-no-bios-boot-partition

In short: you need to have a "BIOS boot partition" of any size to
make grub-install happy.


Alessandro