rsync to a drobo nas

The simplest method would be to invoke rsync via ssh on the remote machine to complete the data synchronization. Try the command below:

/usr/bin/rsync -avz -e ssh /test root@IP:/mnt/DroboFS/Shares/test

It would be quite beneficial if you setup shared keys for the ssh sessions so that you don't have to enter the password for each synchronization. However for security reasons I recommend setting up a new user account with rights only to read and write to the directories and use that account only for synchronization, so that you don't have to leave ssh open for root access.