syncing files between drobos

Can you recommend any software apps for cloning (duplicating) from one Drobo to another Drobo over gigabit Ethernet?

I want to be able to “smart” sync the 2 Drobos so that the target Drobo is updated without having to re-copy all the files.

All files should appear normally in the Mac Finder on both Drobos.

Not sure it’ll work, but take a look at BitTorrentSync. There is a Drobo 5N program in beta form for it.

hi ive only used it on windows, but have a look here in case it helps:
http://www.drobospace.com/forums/showthread.php?tid=144029

BitTorrent Sync is now an official Drobo 5N Drobo App. If you have a Mac or a PC, you can install BitTorrent Sync and sync to the Drobo 5N.

http://help.getsync.com/customer/portal/articles/1888508-drobo