query re: dual-boot on two separate HDDs

[Dave]

On Wednesday, 26 June 2019 04:48:59 BST Frank Fenderbender wrote:
> I am adding the FreeBSD 12 install to the 2nd hard drive.
> Often, the dual-boot instructions appear to be for a same-drive, different partition configuration.
> I give each OS its own [whole] drive, in an attempt to assist in the avoidance of segmentation faults, corruptions, performance hits, and the like, often used by data, applications, and OS slam-dancing, as in a crowded "mosh pit".
> 
> So, with many well-meaning ways to botch this, I thought maybe someone had performed a similar sequence of steps that:
>         adds FreeBSD to a second drive
>         edits the GRUB/bootloader cfg file(s)
> 
> I am uncertain if Grub gets called by the BIOS call to the bootloader, and so, is specific to Ubuntu?
> I would expect it to be dealing with partition choices on one drive, rather than stipulating starting a boot on another drive. 

Since it's going to involve a keypress or two anyway, a quick'n'dirty "fix might be to use the BIOS boot menu, usually accessed from a Fn key at boot time when the BIOS logo/info screen is displayed.