Twin HD & Grub manu

[Liam Proven]

On Thu, 12 Sep 2019 at 12:10, Grizzly via ubuntu-users
<ubuntu-users at lists.ubuntu.com> wrote:
>
> How can I get all the OS's on Grub(2) Menu?
>
> I thought that during boot the OS's were scanned and added

They should be.

When you choose one HD or the other, and boot the machine, can you see
the contents of the other drive(s)?

I suggest:

* boot from your preferred HD
* make sure that all partitions on all drives are mounted
* from a terminal, run ``sudo update-grub''

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