A Question About Two Bullseye OS on different Dives.

["Stephen P. Molnar" <s.molnar@sbcglobal.net>]

My main Debian platform has four drives:

/dev/sda    500GB Buster
/dev./sdb   1  TB
/dev/sdc    500 GB
/dev/sdd    1TB  Bullseye

The boot order is  /dev/sr0 then /dev/ssd, which i want to keep. Now 
grub comes up with /dev/sdd as the default and /dev/sda as the second 
choice. What I want to do is install a second Bullseye on /dev/sda 
without changing the grub boot order. How do I go about accomplishing this?

I have googled the question and not found an answer that I understand.

Thanks in advance.

--
Stephen P. Molnar, Ph.D.
www.molecular-modeling.net
614.312.7528 (c)
Skype:  smolnar1