I haven't looked to see but usually just look to see that there are two separate paths. I'll take a look closer on the next install or head swap with both types of shelves. With both paths active it might just be a reporting thing but maybe Jay can post on here how it is handled is storage show disk -p.
I also noticed yesterday also that disk assign -n 12 with a SAS shelf will assign 2 drives next to each other at a time (1-2, 5-6, 9-10, etc) instead of 12 contiguous drives (1-12).