π ~1 min read
Table of contents
Symptom & Impact
Logical volumes are unavailable after reboot, causing mount and service failures.
Environment & Reproduction
Appears after UUID changes, missing PV devices, or initramfs module issues.
Root Cause Analysis
LVM metadata scan cannot assemble volume group before dependent mounts start.
Quick Triage
List PV/VG/LV state and confirm required block devices are present.
Step-by-Step Diagnosis
Inspect lvm2 logs, metadata consistency, and systemd ordering for activation.
Solution – Primary Fix
Restore device mappings, refresh initramfs, and enable reliable VG activation.
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Solution – Alternative Approaches
Use static mappings or manual activation units for edge hardware cases.
Verification & Acceptance Criteria
All expected logical volumes activate and mount automatically on reboot.
Rollback Plan
Revert LVM config and initramfs changes if activation regressions persist.
Prevention & Hardening
Back up LVM metadata and test activation path during maintenance windows.
Related Errors & Cross-Refs
Volume group not found and dependency failed for local mount units are common.
Related tutorial: View the step-by-step tutorial for Ubuntu 16.04 LTS.
View all Ubuntu 16.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Consult lvm2 administration and Ubuntu boot storage integration documentation.
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