IBM AIX 7.3 – Common Problem 143 – 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

`emgr -l` shows efixes in `S` (stale) state after a TL update and the kernel fails to boot.

Environment & Reproduction

AIX 7.3 LPAR with several IBM-issued ifixes installed via `emgr -e`.

Root Cause Analysis

Stacked ifixes were not removed before the TL update and now collide with new bos.rte.

Quick Triage

Run `emgr -l` and `emgr -P` to list installed and pending fixes; capture the stale labels.

Step-by-Step Diagnosis

Boot from the alternate disk (alt_rootvg) and inspect `/var/adm/ras/emgr.log`.

Solution – Primary Fix

Remove the stale ifix: `emgr -r -L `, then re-run `install_all_updates`.

Solution – Alternative Approaches

Boot maintenance mode and run `emgr -X -L ` to force-remove a wedged efix.

Verification & Acceptance Criteria

`emgr -l` shows only `S`tate `S` cleared and `bosboot` succeeds on the active rootvg.

Rollback Plan

Activate `altinst_rootvg` via `bootlist -m normal hdiskAlt` and reboot to roll back.

Prevention & Hardening

Always run `emgr -l` and remove or reinstall ifixes during TL/SP planning windows.

Related Errors & Cross-Refs

Related to `0517-065` `bosboot` errors and `KERNEL_PANIC` errpt entries.

Related tutorial: View the step-by-step tutorial for aix-7.3.

View all aix-7.3 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

IBM Docs: `emgr`, IBM Power Systems ifix management.