Mounting issue MacOS

macOS Big Sur 11.4

Drobo 5C attached directly to the iMac.

My issue is that when I restart the Mac, the Drobo appears to incorrectly mount, it shows generic Mac icons for external drives.

Then 20min later or so ejects itself (I get the MacOS warning about disconnecting drives) Then it proceeds to mount properly from then on.

Is there something that I can do to fix this behaviour?

I am having similar issues. Unmounting often and the drobo icon moving from generic to the drobo icon.

This seems to have started with the Big Sur updates.

Anyone find a fix?

Sadly have heard nothing. Presumed this must be fairly widespread, can’t believe it’s just my iMac.

Would be great if anyone knows the answer.

I updated my Mac to the latest macOS Big Sur 11.5 today and but just before I did I checked Drobo to see if there was an update and I saw there was so I updated it as the new macOS Big Sur 11.5 was downloading to my mac. Well now once again my Drobo 8D will not remount back. I have client videos to edit and files I need to access this is frustrating!!