Chapter 6. Troubleshooting And Problem Solving; Overview; Initial Start-Up Problems; Leds - IBM Medium J11 Hardware Installation And Maintenance Manual

Chapter 6. Troubleshooting and problem solving

These procedures are intended to be used only during initial configuration, for the purpose of verifying
that hardware setup is successful. They are not intended to be used as troubleshooting procedures for
configured systems using production data and I/O.

Overview

The enclosure system includes a Storage Enclosure Processor (SEP) and associated monitoring and
control logic to enable it to diagnose problems with the enclosure's power, cooling, and drive systems.
Management interfaces allow for provisioning, monitoring, and managing the storage system.
Important:
See the "Fault isolation methodology" on page 52 section when conducting system diagnostics.

Initial start-up problems

Faulty power cords
Check that you have correctly cabled the system. Contact IBM support for replacements if:
• Power cables are missing or damaged.
• Plugs are incorrect.
• Power cables are too short.
Controller Node does not recognize the enclosure system
1. Verify that the interface cables from the enclosure to the host computer are fitted correctly.
2. Verify that the LEDs on all installed drive carrier modules are on (green).
3. Verify that the drive carrier modules have been correctly installed.
4. Check any visible SAS indicators (Controller Node HBA Module, Disk Enclosure, and IOM Control
Module, if applicable).
5. Check HBA BIOS for SAS target visibility.
6. Verify that ClevOS has been installed correctly.
Note: If the enclosure fails initialization, see the "If the enclosure does not initialize" on page 52
section.

LEDs

Overview
LED colors are used consistently throughout the enclosure and its components for indicating status:
Green
Good or positive indication
Blinking green/amber
Non-critical condition
Amber
Critical fault
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