Proper software configuration for multiple Drobos?

I have a client with a Drobo 2nd Gen and a Drobo 5D. He’s running OS X Yosemite. What version of Drobo Dashboard should he use and what known issues exist with Dashboard version 2.5.4 and Yosemite?

It would appear he should run Dashboard 2.5.4 for the Drobo 2nd Gen and Dashboard 2.6.3 for the Drobo 5D. Not sure how to resolve that.

Just go for the latest.