IBM AIX 7.2 – Common Problem 244 – 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

LPAR halts with a panic banner and reboots into the dump device; outage occurs.

Environment & Reproduction

Often triggered by faulty driver ifix, hardware fault, or storage stack regression.

Root Cause Analysis

AIX kernel encounters an unrecoverable condition and writes to /dev/sysdumpdev.

Quick Triage

Run errpt | grep DUMP and sysdumpdev -L to confirm a recent system dump.

Step-by-Step Diagnosis

Use snap -gfkD and savecore -F /var/adm/ras to collect dump for IBM support.

Solution – Primary Fix

Apply IBM-recommended ifix or remove the suspected ifix via emgr -r and reboot.

Solution – Alternative Approaches

If hardware is suspected, run diag and review HMC service events for FRU calls.

Verification & Acceptance Criteria

No further panics for 7 days and errpt shows no related driver errors.

Rollback Plan

Boot from alt_disk_copy and restore the previous kernel state if the fix regresses.

Prevention & Hardening

Track ifix levels via emgr -l and stage them in test LPARs first.

Related Errors & Cross-Refs

Related to driver upgrades, hardware FRUs, and unsupported firmware combos.

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

IBM AIX 7.2 system dump and snap documentation.