For whoever is using Crashplan on a Drobo FS or Drobo 5N at home, the maintainer (Ricardo) released the update for the 3.6.4 release. You may have noticed your backups to or from Crashplan running headless on your Drobo might not have been working as early as September 2014.
Here’s the updated download page:
I saved my backupArchives directories and did a re-install, then put my backupArchives directories back.
The Drobo Dashboard still thinks I need to update Crashplan. Since I know I don't, I'm just going to avoid that button. I suspect it'll just break Crashplan.