Chapter 5. Troubleshooting and problem solving
Overview
The small disk 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 and drive
systems.
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 small disk enclosure system
1. Verify that the interface cables from the enclosure to the IBM COS node controller 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 (COS Controller Node HBA, and IOM control module).
5. Verify that ClevOS has been installed correctly.
LEDs
Overview
LED colors are used consistently throughout the enclosure and its components for indicating status:
Green
Good or positive indication
Flashing green/amber
Non-critical condition
Amber
Critical fault
580W PCM LEDs
Under normal conditions the PCM OK LEDs will be a constant green. When a fault occurs, the colors of the
LEDs will be as shown in the following table. See also Figure 7 on page 8 .
Table 9. PSU LED status
PCM OK(Green)
Fan Fail (Amber)
AC Fail (Amber)
DC Fail (Amber)
Status
Off
Off
Off
Off
No AC on any PCM
Off
Off
On
On
No AC on this PCM
only
©
Copyright IBM Corp. , 2020
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