[KaterM]

Hello Matt, this is my first post. Thank you for your efforts.

Although I have read the whole thread and studied your well commented script in detail, I still have a question.

I am using a Celeron Asus Chromebox with 4G RAM.
I bought it as a replacement for my burnt out Asrock ION 300.
I rescued the hdd with ubuntu on it and put it in a case connected by sata/usb3. I can read and write fine to it from my chromebox under Chrome OS and crouton/ubuntu.
The connected periferics have not changed, I also am able to boot from the hdd in question on a friend's laptop.

So:
I just would like to boot to this hdd from my chromebox, if I want to, but still be able to use ChromeOS and automatic updates.
I suppose the part
"-----------------------------------------
Update Legacy BIOS (dual boot)
-----------------------------------------"
of your script would do that, but I am still uncertain.
Would you please advise?

Thanks a lot,
KaterM