Ubuntu 14.04 LTS Out of Inodes Despite Free Disk Space

📖 ~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

Writes fail with no space errors while block storage appears mostly available.

Environment & Reproduction

Common on mail spools, cache trees, or log directories with tiny file explosions.

Root Cause Analysis

Filesystem inode table fully consumed before block capacity is reached.

Quick Triage

Identify mountpoint with inode saturation and largest file-count paths.

Step-by-Step Diagnosis

Map inode-heavy directories, then correlate with application retention and rotation settings.

Solution – Primary Fix

Prune temporary file sets safely and enforce retention limits to recover inode capacity.

Solution – Alternative Approaches

Migrate high-churn workloads to XFS or recreate ext filesystem with higher inode density.

Verification & Acceptance Criteria

Inode utilization drops below alert threshold and write operations resume normally.

Rollback Plan

Restore pruned data from backup where required by compliance retention rules.

Prevention & Hardening

Deploy inode-specific monitoring and cap temporary artifact generation by service.

Related Errors & Cross-Refs

No space left on device with low block use and journal write failures.

Related tutorial: View the step-by-step tutorial for Ubuntu 14.04 LTS.

View all Ubuntu 14.04 LTS tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

Linux filesystem inode design and capacity planning references.