There are a number of elderly threads on this, so I was wondering if there is any fix to the problem of my Drobo 5c randomly ejecting when my Mac is left alone for a while?
I come back to dozens of ‘Disk not ejected properly messages’ and the device (called Drobo) now appears in /Volumes as Drobo, Drobo 1, Drobo 2… Each time it is disconnected, the disk appears to mount normally shortly afterwards - it is visible in Drobo Dashboard and I can browse it in Finder. However, my Backblaze backup which is looking for a disk called Drobo now sees a disk called Drobo 1 which remains until I restart either the Drobo or the Mac.
The Mac is a new iMac Pro running macOS Catalina 10.15.5. The Drobo is running firmware 4.1.4 [11.66.111430] and Drobo Dashboard is Version 3.5.0 .
The Drobo is directly connected to the Mac using the supplied cable to the iMac’s Thunderbolt ports and is using the normal power supply.
The Mac’s energy saving features are set with ‘Prevent computer from sleeping automatically when the display is off’ [OFF]; ‘Put hard disks to sleep when possible’ [OFF]; ‘Wake for network access’ [ON]; ‘Start up automatically after a power failure’ [OFF]; and ‘Enable Power Nap’ [ON].
‘Disk Drive Spindown’ in Drobo Dashboard’s General Settings is [OFF].
Drobo Dashboard cannot see any problems with the Drobo or the disks (all lights are green and there are no errors). I have checked with macOS Disk Utility and used First Aid - no errors were found.
So I’m baffled - annoyed and baffled. Am I missing something and there is a nice easy solution; or is this still a mystery?