I have had to reformat my Drobo 3rd Gen about 4 times in the past two weeks. I have replaced all the drives with brand new drives, but there is still some problem between macOS Sierra and Time Machine, or the Drobo altogether.
I have initialized the Drobo with 4 2TB drives, and specified that there is a 1TB Time Machine backup volume. The drives were named Drobo and DroboTM. I successfully completed a complete backup and several hourly yesterday, and then left my computer for the day.
When I came to my computer this morning I got several notifications that the DroboTM volume was not ejected properly. I can see that the Drobo volume is still mounted and appears to be accessible but no DroboTM volume. However, within the Drobo Dashboard I see two volumes but they are both named Drobo! I try to rename the volume within the Drobo Dashboard but it fails.
Has anyone else had a nightmare with their Drobo 3rd generation and macOS Sierra?