To add them to the chia client, I just make a list of all the paths in an excel file. All my drives are mounted in nfts folders named after the physical slot they occupy, so
Easy to make in excel with concat() and then copy paste into the chia config in one go
I’ve also mounted all drives to one folder but there are sub folders for each external JBOD with each drive clearly identified in the OS and also physically. Makes things easier to find the correct missing drive due to either a loose cable or drive failure (not happened yet, touch wood).
I never used the recursive scan though, I probably should