🟠 High   ⏱ 5–30 min  Last verified: 20 May 2026
Affected versions: Oracle Linux 10

📖 ~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

Applications referencing /dev/mapper names fail when aliases shift across reboots.

Environment & Reproduction

Occurs in SAN environments without stable WWID alias rules.

sudo multipath -ll

Root Cause Analysis

Map names are auto-generated from discovery order rather than fixed aliases.

Quick Triage

Capture current WWIDs and dependent mount/LVM references.

sudo ls -l /dev/mapper | grep mpath

Step-by-Step Diagnosis

Inspect /etc/multipath.conf bindings and check initramfs for updated config.

sudo multipathd show config
Illustrative mockup for oracle-linux-10 — multipath_ll_output
Multipath map identifiers — Illustrative mockup — Progressive Robot

Solution – Primary Fix

Define explicit aliases by WWID and rebuild initramfs so boot uses stable names.

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sudo mpathconf --enable && sudo dracut -f
Illustrative mockup for oracle-linux-10 — multipath_alias_config
Persistent alias configuration — Illustrative mockup — Progressive Robot

Solution – Alternative Approaches

Use UUID-based mounts and LVM PV UUID references to reduce name dependence.

Verification & Acceptance Criteria

Aliases remain consistent after reboot and dependent services start normally.

Rollback Plan

Revert multipath.conf and restore prior bindings file from backup.

Prevention & Hardening

Enforce WWID alias standards and include post-reboot path validation checks.

Cross-reference path flapping, SAN zoning drift, and duplicate WWID detection.

Related tutorial: View the step-by-step tutorial for oracle-linux-10.

View all oracle-linux-10 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

RHEL DM-Multipath deployment and naming persistence guidance.

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