D-Link xStack Storage DSN-1100 Hardware Reference Manual page 14

LED
Drive Power
Drive Activity
and Fault
14 Chapter 2 DSN-1100 Layout
Figure 2-2. Hard Drive Power and Activity LEDs
Table 2-2. Hard Drive LEDs (for each drive 00 through 04)
Color
Blue ON Drive is powered and operational.
Green Blinking Data being transmitted or received from corresponding SATA drive.
Red ON Drive has experienced a fault and is offline
Drive Power LED
Drive Activity and Fault LED
Description