IBM AIX 7.1 – Common Problem 066 – 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

sysdumpdev shows last dump ‘INCOMPLETE’; subsequent crashes have no usable dump.

Environment & Reproduction

Primary dump device sized smaller than estimated dump on TL upgrade.

Root Cause Analysis

Memory growth pushed estimated dump beyond /dev/lg_dumplv size.

Quick Triage

Run sysdumpdev -e and sysdumpdev -l to compare sizes.

Step-by-Step Diagnosis

Use sysdumpdev -L to inspect last dump status code.

Solution – Primary Fix

Extend dump LV with extendlv lg_dumplv matching sysdumpdev -e.

Solution – Alternative Approaches

Switch to /dev/sysdumpnull only briefly to suppress while sizing.

Verification & Acceptance Criteria

sysdumpdev -L next reports ‘SUCCEEDED’ for a test dump.

Rollback Plan

Revert to smaller LV with chlv only if proven safe.

Prevention & Hardening

Auto-monitor with sysdumpdev -K and review after each TL.

Related Errors & Cross-Refs

DUMP_INCOMPLETE errpt entries, missing snap data.

Related tutorial: View the step-by-step tutorial for aix-7.1.

View all aix-7.1 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

AIX system dump configuration documentation.