Hello - let me describe how I configured my FS and what I’ve observed.
I have two shares on the FS. One is the default public share, the other is one I created called “Media”. The only user authorized on the Media share is the Admin user. I configured the FS and the shares from Drobo Dashboard 1.71 on my Windows 7 PC. I transferred files from my Drobo S to the FS. On the FS, the only share that is “checked” in Drobo Dashboard is the Media share, not the public share.
I went to an iMac running Snow Leopard which is on the same subnet. I opened Finder and the Drobo FS was recognized and it listed both the Public AND the Media share. I’m not sure whether it asked this when I first clicked on the FS or when I clicked on the Media share, but Snow Leopard asked me if I wanted to log on as an authorized user or as a guest. I thought I’d check security and I selected Guest, and I had full access to the Media Share! It appears there is NO actual security on the FS. Is that the case? Have I misconfigured the FS? I did not install Drobo Dashboard on the Mac, by the way.