IBM DS3500, Installation, User & Maintenance Manual

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Table 8. ESM numeric display diagnostic codes (continued)
Value Description
H9 Non-Catastrophic HW. ESM operational, but in a degraded mode.
J0 Incompatible module.
ESM LEDs
This section describes the ESM LEDS. Figure 75 shows the LEDs on the ESM.
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.
1 2
ESM
Link fault LED
(amber) Link up LED
(green)
OK to remove LED
(blue)
Fault LED
(amber)
Power-on LED
(green)
Link fault LED
(amber)
Link up LED
(green)
Seven-segment
numeric display
Figure 75. ESM LEDs
80
System Storage DS3500 and EXP3500: Installation, User’s, and Maintenance Guide