Drobo 5N2 User Manual page 182

On critical situations only – Alerts will display on your screen only to warn of a critical status
●
with one or more of your Drobo devices that could lead to potential data loss. These are Critical
Drobo Alerts, which can include when your Drobo device cannot currently protect your data against
drive failure, when your Drobo device doesn't recognize one or more of the drives installed, when
your Drobo device does not detect any drives or when too many drives have been removed.
Drobo5N2 User Guide 182