π ~1 min read
Table of contents
Symptom & Impact
Boot pauses for long timeouts while waiting for block devices.
Environment & Reproduction
Seen after cloning disks or attaching snapshots with duplicate filesystem UUIDs.
Root Cause Analysis
Duplicate UUID references confuse mount resolution and systemd device units.
Quick Triage
Identify duplicate UUID values and affected fstab mount targets.
Step-by-Step Diagnosis
Correlate boot delays with timed-out device units in journal.
Solution – Primary Fix
Assign unique UUID to duplicate filesystem and update fstab accordingly.
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Solution – Alternative Approaches
Use LABEL or /dev/disk/by-id entries where stable unique mapping is required.
Verification & Acceptance Criteria
Boot time normalizes and no device timeout warnings remain.
Rollback Plan
Restore previous UUID and fstab if application mount dependencies fail.
Prevention & Hardening
Regenerate filesystem UUIDs after cloning templates before production use.
Related Errors & Cross-Refs
Related to dependency failed for local file systems and mount timeout.
Related tutorial: View the step-by-step tutorial for Ubuntu 22.04 LTS.
View all Ubuntu 22.04 LTS tutorials on the Tutorials Hub β
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Ubuntu 22.04 persistent block device naming and mount troubleshooting docs.
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