IBM DS3500, Installation, User'S, And Maintenance Manual

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DC power-supply LEDs
This section describes the primary LEDs on the DS3500 dc power supplies.
Standby power LED (green)
Future use only.
DC Out LED (green)
When this green LED is lit, it indicates that the DS3500 is turned on and is supplying both 5-volt
and 12-volt dc power.
OK to remove LED (blue)
When this blue LED is lit, it indicates that it is safe to remove the power supply.
Fault LED (amber)
When this amber LED is lit, it indicates that a power supply or fan has failed or that a redundant
power supply is not turned on.
DC In LED (green)
When this green LED is lit, it indicates that the storage subsystem is receiving dc power.
Front LEDs
This section describes the primary LEDs and controls on the front of the storage subsystem.
The front LEDs and controls on the DS3512 storage subsystem and EXP3512 storage enclosure are shown
in Figure 4-5. The front LEDs and controls on the front of the DS3524 storage subsystem and EXP3524
storage enclosure are shown in Figure 4-6 on page 4-9.
Fault LED (amber)
DC power in LED (green)
OK to remove LED (blue)
DC power out LED (green)
Standby power LED (green)
Figure 4-4. DC power-supply LEDs
Hard disk drive activity LED
Power-on LED
System locator LED
System error LED
Overtemperature LED
Standby power LED
Hard disk drive status LED
Figure 4-5. DS3512 storage subsystem and EXP3512 storage enclosure front LEDs and controls
4-8
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide