Dead FS all lights flashing

Today I walked into our home office and all the lights, power, disk capacity, hard drive status lights, were flashing and a clicking was heard. The dashboard could not find our 8 year old Drobo. The power switch would not power cycle the unit, unplugging and reconnecting returned the same results. I fear it is dead.

We are buying a 5N2 can we just plug the new unit in, power it up, set it up and then plug in the old disks? What is the likelihood that all of our 6TB of family pics, movies, home movies and music are still available?

Thanks for the help,