IBM AIX 7.3 – Common Problem 016 – 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

HMC DLPAR operation to add memory fails with HSCL2932 error.

Environment & Reproduction

IBM AIX 7.3 LPAR exhibiting DLPAR memory add fails issues under standard PowerVM workloads.

lparstat -i
rmcdomainstatus -s ctrmc

Root Cause Analysis

RMC connection between HMC and partition is broken, blocking DLPAR operations.

Quick Triage

Confirm scope with errpt, recent changes, and subsystem state via lssrc.

lssrc -a | grep ctrmc
rmcdomainstatus -s ctrmc

Step-by-Step Diagnosis

Verify RSCT subsystems and HMC RMC connectivity.

lssrc -a | grep -E 'ctrmc|IBM.DRM'
rmcdomainstatus -s ctrmc

Solution – Primary Fix

Restart RSCT subsystems to re-establish RMC.

/usr/sbin/rsct/bin/rmcctrl -z
/usr/sbin/rsct/bin/rmcctrl -A

Solution – Alternative Approaches

Reboot the LPAR if RSCT recovery fails to clear the HSCL error.

Verification & Acceptance Criteria

Confirm subsystem returns to RUNNING state and errpt shows no new entries.

lparstat -i | grep Memory
rmcdomainstatus -s ctrmc

Rollback Plan

Restore prior configuration from mksysb or alt_disk_install clone if the fix regresses.

stopsrc -s ctrmc && startsrc -s ctrmc

Prevention & Hardening

Encode the fix in NIM customisation scripts and monitor via topas/nmon.

smit rsct  # monitor RMC heartbeat

Related Errors & Cross-Refs

HSCL2932; HSCLA319 RMC errors

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

HMC and RSCT troubleshooting guide