Dell EMC ME4 Series Owner's Manual page 24

Figure 29. LEDs: Ops panel—5U enclosure front panel
Table 5. Ops panel functions (see left ear on 5U front panel)
No. Indicator
1 Unit Identification Display (UID)
2 System Power On/Standby
3 Module Fault
4 Logical Status
5 Top Drawer Fault
6 Bottom Drawer Fault
Unit identification display
The UID is a dual seven-segment display that shows the numerical position of the enclosure in the cabling sequence. This is also called the
enclosure ID. The controller enclosure ID is 0.
System Power On/Standby LED (green/amber)
LED is amber when only the standby power is available (non-operational). LED is green when system power is available (operational).
Module Fault LED (amber)
LED turns amber when experiencing a system hardware fault. This LED helps you identify the component causing the fault, which can be
associated with a Fault LED on a PSU, FCM, IOM, DDIC, or drawer.
Logical Status LED (amber)
This LED indicates a change of status or fault from something other than the enclosure management system. This may be initiated from
the controller module or an external HBA. The indication is typically associated with a DDIC and LEDs at each disk position within the
drawer, which help to identify the DDIC affected.
24 Storage system hardware
Status
Green (seven-segment display: enclosure sequence)
Constant green: positive indication
Constant amber: system in standby (not operational)
Constant or blinking amber: fault present
Constant or blinking amber: fault present
Constant or blinking amber: fault present in drive, cable, or sideplane
Constant or blinking amber: fault present in drive, cable, or sideplane