I came home today to find the Drobo 5n in a critical state. The bottom two drives disappeared from the array. The unit was in data protection mode that would last over 24 hours. I started copying data to a computer, when about an hour into it, the remaining 3 drives disappeared. Now Drobo claims there are no drives installed.
I powered down the unit, and waited a little while before powering up again, but it still says no drives installed.
What is the best way to get my data back?