Hitachi NAS Platform 4000 Series Hardware Reference Manual page 35

Figure 6 Model 4040 status LEDs
Figure 7 Models 4060, 4080, and 4100 status LEDs
LEDs
1 Hard disk drive A status LED
2 Hard disk drive B status LED
3 NVRAM battery backup pack status LED
4 Fan 1 status LED
5 Fan 2 status LED
6 Power status LED
7 Server status LED
Chapter 4: Hitachi NAS Platform server components
Hitachi NAS Platform and Hitachi Unified Storage Series 4000 Hardware Reference
Table 2 LED descriptions
Meaning
LED status indicators
35