New
#21
I already explained why its best if the minor adjustment can be made to avoid having a Primary partition preceding the OS, lest the System boot files can be derailed during repairs or reinstall to the first Primary partition. We have been dealing with this issue here for years so if you've somehow missed it then please at least don't contradict help I've given thousands of times after observing countless misplaced System partitions.
If you are unable to make OS disk Disk0 then be aware of this possibility and unplug all other drives during repairs or reinstall.