How can I install FreeBSD and Ubuntu server on same machine but different disk?

FreeBSD

How can I install FreeBSD and Ubuntu server on same machine but different disk?

I have 1 computer with 2 hard disk. First is 320GB (let say diskA) and the other is 80GB (let say diskB). Both are SATA with the diskA being master. Now I want to install Ubuntu server in diskA and FreeBSD in diskB. My goal is that two of them can be used and i can use grub2 to switch between them. How can I accomplish that?

Thanks before ?

FreeBSD best answer:

Answer by ratter_of_the_shire
There’s no such thing as a Master SATA disk as you can only connect one disk to the controller with one cable. Just call it the primary or first boot disk.

Install FreeBSD but do not install the bootloader. Then install Ubuntu and it’s boatloader. It should scan for and detect the FreeBSD installation and add an appropriate entry to the boot menu.