Apc SGI 15000 RAID User Manual Page 132

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118 007-5510-002
3 Check that there is a valid SAS signal present at the I/O connector. If there is no signal present, ensure
the cable has been properly inserted.
4 Check the I/O module setup as follows:
Ensure the I/O module has been correctly installed and all external links and cables are securely
fitted.
Ensure the maximum cable length has not been exceeded.
8.3 LEDs
Green LEDs are always used for good or positive indication. Amber LEDs indicate there is a critical
fault present within the module. See specific LED tables for further information.
8.3.1 HDD (Hard Disk Drive)
When a HDD is faulted, Table 8–1 describes the fault LED behavior.
Under Normal conditions, the LEDs should all be illuminated constant GREEN.
If a problem is detected, the color of the relevant LED will change to AMBER.
8.3.2 PCM (Power Cooling Module)
The PCM LEDs are shown in Table 8–2.
Under Normal conditions, the LEDs should all be illuminated constant GREEN
If a problem is detected, the color of the relevant LED will change to AMBER.
8.3.3 DEM (Drive Expander Module)
The DEM fault LEDs are explained in Table 8–3.
Table 8–1 HDD LEDs
Location Color Identifier Behavior
Enclosure front Amber Enclosure fault This LED is ON with a drive fault
Enclosure front Amber Drive fault This LED is ON with a drive fault
Table 8–2 PCM LEDs
Location Color LED Identifier Behavior
FRONT Enclosure Amber Enclosure fault This LED is ON with a PCM fault.
REAR Enclosure
PCM
Amber PCM fault This LED is ON with an AC input, DC output,
fan or other PCM fault.
REAR Enclosure
PCM
Green AC OK This LED is ON with a DC or fan fault.
This LED is OFF with an AC input failure.
REAR Enclosure
PCM
Green DC OK This LED is ON with an AC or fan fault.
This LED is OFF with an DC output failure
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