I'd like to run a backup rsync job from one Drobo to another. I've managed to get rsync and the ssh tools installed so that I can ssh from my desktop into backup@drobo1.local and then ssh into backup@drobo2.local from drobo1.local
What I need to setup is the backup user on Drobo2 which has a passwordless login from Drobo1.
How do I go about setting this up?