Yes, the LED Indicators can display all status and alerts for Disk error, Rebuild, power on, and fan error. However, due to the chipset's design, the LED Indicators WILL NOT be able to display any status alerts for Disk Error and Rebuild process when the RAID MASTER is CLOSED. Hence, if prefer to receive all alerts and monitor all features via LED Indicators, please keep the RAID MASTER "ON" at all times.