Drobo storage device keeps disconnecting
I have a 27" iMac and am running OS X 10.11.3. I have a Drobo 5D with 2 hard drives connected to the iMac via a thunderbolt cable. Both the iMac and the Drobo are on 24/7. When i am done working on the computer i put it to sleep. Sometimes when I wake up the computer i get the following message, "Disk not ejected properly. Eject the "Drobo" before disconnecting or turning it off. I never turn either the computer or the drobo off. They both run continuously. What can I do to correct this.