Dell PowerVault MD1120 Hardware Owner's Manual page 12

Figure 1-3. Physical Disk Carrier LED Indicators
1 activity LED
Table 1-3. Physical Disk Carrier Status LEDs
LED
Off
Steady green
Green flashing (250
milliseconds [ms])
Green flashing
On 400 ms
Off 100 ms
Amber flashing (125 ms)
12
About Your System
1
2 status LED
Description
Slot empty, physical disk not yet discovered by
server, or an unsupported physical disk is present
Physical disk is online
Physical disk is being identified or is being prepared
for removal
Physical disk rebuilding
Physical disk failed
2