IBM AIX 7.2 – Common Problem 074 – Diagnosis and Fix

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Fibre Channel adapter on AIX 7.3 shows ‘Available’ but lspath reports paths Failed.

Environment & Reproduction

SAN fabric port flaps or zoning change isolated one HBA from targets.

Root Cause Analysis

fcs adapter sees light but PLOGI fails to one fabric.

Quick Triage

Run lsdev -Cc adapter | grep fcs and lspath -F’name:path_status:status’.

Step-by-Step Diagnosis

Use fcstat fcsN and errpt -j for adapter health.

Solution – Primary Fix

Re-enable failed paths with chpath -l hdiskN -p fscsiM -s enable.

Solution – Alternative Approaches

Disable bad path with chpath -s disable until fabric fixed.

Verification & Acceptance Criteria

lspath shows all paths Enabled and fcstat error counters stop rising.

Rollback Plan

Detach FC adapter with rmdev -dl fcsN -R as emergency removal.

Prevention & Hardening

Maintain dual-fabric zoning and monitor fcstat trends.

Related Errors & Cross-Refs

FCP_ARRAY_ERR2, link down events, MPIO failover delays.

Related tutorial: View the step-by-step tutorial for aix-7.2.

View all aix-7.2 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

AIX Fibre Channel and MPIO administration guide.