Chapter 5. Troubleshooting; Initial Start-Up Problems; Leds; Psu Leds - IBM 084 Installation And User Manual

Chapter 5. Troubleshooting

The enclosure system includes a Storage Enclosure Processor (SEP) and associated monitoring and
control logic to enable it to diagnose problems within the enclosure's power, cooling, PSU and drive
systems.

Initial start-up problems

A number of issues can occur when powering on the enclosure.
Power fault
Ensure that you have wired up the enclosure system correctly and that mains power is present. Call your
supplier for replacements if any of the following situations occur:
• Cords are missing or damaged
• Plugs are incorrect
• Cords are too short
Host Computer Does Not Recognize Enclosure
ESS I/O server nodes do not recognize the enclosure.
Ensure that the enclosure is properly connected. See the approved cabling schema in the Cabling the
Elastic Storage Server Appendix of Elastic Storage Server Deploying the Elastic Storage Server Guide.
See subsection Disk Enclosure and HBA cabling in chapter Setting up IBM Spectrum Scale RAID in the
Elastic Storage Server Spectrum Scale RAID Administration Guide.

LEDs

LED colors are used consistently throughout the enclosure and its components to indicate status
Green
Good or positive indication
Flashing green or amber
Non-critical condition
Amber
Fault
Note: When the enclosure is powered on, all LEDs light up for a short period to ensure that they are
working. This condition does not indicate a fault unless the LEDs remain lit after a few seconds.

PSU LEDs

Figure 21. PSU LEDs
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