Drobo FS “Internal Problem”

Once again the hugely unreliable DroboFS I’m using as a backup destination in one of our offices has suddenly lost all it’s data with no warning.

It’s now reporting “Internal Problem, please contact Drobo support”

After a little googling apparently you can run some disk maintenance by pressing CTRL > SHIFT > M (while Drobo Dashboard is open). This can take between 1 hour and 1 day to run.