Number Severity Description/Recommended actions
If a voltage sensor has exceeded the normal operating range but is within safe operating limits:
• Check that all modules in the enclosure are fully seated in their slots and that their latches are locked.
• If this does not resolve the issue, the indicated FRU has probably failed and should be replaced.
If a voltage sensor has been removed:
• Check that the indicated FRU is in the indicated enclosure.
• If the FRU is not in the enclosure, install the FRU immediately.
• If the FRU is in the enclosure, ensure that the FRU is fully seated in its slot and that its latches are locked.
• If this does not resolve the issue, the indicated FRU has probably failed and should be replaced.
When the problem is resolved, an event with the same code will be logged with Resolved severity.
Resolved A SES alert for a voltage sensor in the indicated enclosure has been resolved.
Recommended actions:
• No action is required.
555 Error The local Expander Controller rmware has detected a level of incompatibility with the partner Expander
Controller rmware or hardware. As a preventive measure, the local Expander Controller may disable all the
PHYs.
Recommended actions:
• Check that both the Expander Controllers have the correct rmware revision.
• If both Expander Controllers have dierent rmware versions, upgrade the partner controller module to
the appropriate rmware that is compatible with the enclosure.
• If this does not resolve the problem, replace the partner controller module.
When the problem is resolved, an event with the same code will be logged with Resolved severity.
Warning An expander in a controller module, expansion module, or drawer is mated but is not responding; or, an
expander in an expansion module has been removed.
Recommended actions:
• Check that the indicated FRU is in the indicated enclosure.
• If the FRU is not in the enclosure, install the appropriate FRU immediately.
• If the FRU is in the enclosure, ensure that the FRU is fully seated in its slot and that its latches, if any, are
locked.
• If none of the above resolves the issue, the indicated FRU has failed and should be replaced.
When the problem is resolved, an event with the same code will be logged with Resolved severity,
Resolved A SES alert for an expander in the indicated enclosure has been resolved.
Recommended actions:
• No action is required.
556 Error An alert condition was detected on a root expander or drawer expander element.
Recommended actions:
• Replace the module that contains the indicated expander. This could be an IOM, sideplane or a drawer.
Contact technical support for replacement of the module containing the drawer expander.
• If this does not resolve the issue, contact technical support. The enclosure must be replaced.
When the problem is resolved, an event with the same code will be logged with Resolved severity.
Warning An alert condition was detected on a root expander or drawer expander element.
Events and event messages 129
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