Checking The Leds; Ac Power-Supply Leds; Dc Power-Supply Leds - IBM DS3500 Installation, User's, And Maintenance Manual

Checking the LEDs

The LEDs indicate the status of the storage subsystem and components. Green
LEDs indicate a normal operating status; amber LEDs indicate a possible failure; a
blue LED on a component indicates that it is safe to remove the component.
The DS3500 also has a blue system locator LED that is lit when the menu function
is selected in the Subsystem Management window, causing the Locate command to
be sent to the DS3500.
Check all the LEDs on the front and rear of the storage subsystem when you turn
on the power. During power-on, the LEDs flash intermittently as the storage
subsystem and components complete the power-on process. In addition to
checking for faults, you can use the LEDs on the front of the storage subsystem to
determine whether the drives are responding to I/O transmissions from the host.

AC power-supply LEDs

This section describes the primary LEDs on the DS3500 ac power supplies.
Standby power LED (green)
Figure 77. AC power-supply LEDs
Standby power LED (green)
DC power LED (green)
OK to remove LED (blue)
Fault LED (amber)
AC power LED (green)

DC power-supply LEDs

This section describes the primary LEDs on the DS3500 dc power supplies.
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IBM System Storage DS3500 and EXP3500 Storage Subsystem: Installation, User's, and Maintenance Guide
DC power LED (green)
OK to remove LED (blue)
Fault LED (amber)
AC power LED (green)
Future use only.
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.
When this blue LED is lit, it indicates that it is safe to remove the power
supply.
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.
When this green LED is lit, it indicates that the storage subsystem is
receiving ac power.