📖 ~1 min read
Table of contents
Symptom & Impact
Filesystem mounts fail on reboot and dependent services do not start.
Environment & Reproduction
Debian 9 fstab entries changed after disk replacement or volume migration.
Root Cause Analysis
Incorrect UUIDs, options, or filesystem types cause mount processing failures.
Quick Triage
Validate block devices and run non-destructive fstab verification checks.
Step-by-Step Diagnosis
Inspect journal logs, compare UUID mappings, and test each mount entry safely.
Solution – Primary Fix
Correct fstab values, repair filesystem metadata, and remount with proper options.
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Solution – Alternative Approaches
Use systemd mount units for complex dependency ordering.
Verification & Acceptance Criteria
All required mounts activate successfully and services recover on boot.
Rollback Plan
Restore previous fstab and revert mount option changes if regressions appear.
Prevention & Hardening
Track storage inventory and validate mount changes before reboot.
Related Errors & Cross-Refs
Related to initramfs root mount failures and disk UUID drift.
Related tutorial: View the step-by-step tutorial for debian-9.
View all debian-9 tutorials on the Tutorials Hub →
Browse all common problems & solutions on the Tutorials Hub.
References & Further Reading
Debian storage and filesystem mount reference material.
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