Esm Leds; Turning Off The Storage Subsystem - IBM DS3500 Installation, User's, And Maintenance Manual

ESM LEDs

This section describes the ESM LEDS. Figure 4-13 shows the LEDs on the ESM.
Link fault LED
(amber)
ESM
Power-on LED
OK to remove LED
(green)
(blue)
Fault LED
(amber)
Figure 4-13. ESM LEDs
Link fault LED (amber)
When this amber LED is lit, it indicates that the link through the SAS cable is not successful.
Link up LED (green)
When this green LED is lit, it indicates that the link through the SAS cable is successful.
OK to remove LED (blue)
This LED is supported only when the EXP3500 is attached to a DS3500 controller. Do not remove
the ESM unless this blue LED is lit.
Fault LED (amber)
When this amber LED is lit, it indicates that the ESM has failed.
Power-on LED (green)
When this green LED is lit, it indicates that the ESM is receiving power.

Turning off the storage subsystem

The DS3500 is designed to run continuously. After you turn it on, do not turn it off. Turn off the power
only in the following situations:
v Instructions in a hardware or software procedure require that you turn off the power.
v An IBM technical-support representative instructs you to turn off the power.
v A power outage or emergency situation occurs, see "Restoring power after an unexpected shutdown"
on page 4-17.
Attention: Except in an emergency, never turn off the power if any amber (needs attention) LEDs are lit.
Correct the fault before you turn off the power. Use the Storage Manager software and the amber LEDs
to check the overall status of the DS3500. All LEDs should be green on the front of the storage subsystem.
If they are not, use the Storage Manager software to diagnose the problem so that the DS3500 will
power-on correctly later.
(L003)
4-14
System Storage DS3500 and EXP3500: Installation, User's, and Maintenance Guide
Link up LED Link fault LED
(green) (amber)
1 2
Seven-segment
numeric display
Link up LED
(green)