Software⏱️ 3 min read📅 2026-06-19

How to Fix: Is tune2fs -l /dev/mmcblk0pN reliable for checking file system error?

How to fix tune2fs -l /dev/mmcblk0pN reliability for checking file system errors.

Quick Answer: Use tune2fs -l | grep 'Filesystem state' | grep 'error' for a basic check, but consider using e2fsck or fsck -C for more detailed error analysis.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🚀 How to Resolve This Issue
  3. 🎯 Final Words

We have encountered an issue with our Linux-based system, specifically with the tune2fs -l command on our eMMC partitions. The issue arises when using this command to check for file system errors in a mounted partition, as it provides unreliable results. This problem affects systems running Linux-3.12 and have ext4 partitions on their eMMC storage.

This issue is frustrating because it prevents us from accurately identifying and correcting file system errors. However, we are determined to find an alternative solution that can provide reliable results. In this guide, we will explore the root causes of this issue and present two methods for checking file system errors: using tune2fs -l and e2fsck.

⚠️ Common Causes

  • The primary reason for this issue is due to the fact that tune2fs -l only provides a snapshot of the file system's state at the time of execution. When a partition is mounted and files are being created, the file system's state changes, which can lead to unreliable results.
  • Another possible cause is the specific configuration of our Linux system, particularly with regards to the tune2fs -l command itself.

🚀 How to Resolve This Issue

Using Tune2fs -l

  1. Step 1: To use tune2fs -l, execute the following command: tune2fs -l /dev/mmcblk0pN | grep "Filesystem state" | grep "error" This will provide a snapshot of the file system's state at the time of execution, which may not accurately reflect any changes made since the last execution.
  2. Step 2: The output of this command can be one of three values: clean, clean with errors, or not clean. However, these values do not provide detailed information about the nature of any errors present in the file system.
  3. Step 3: Therefore, using tune2fs -l alone may not be sufficient for accurately detecting and correcting file system errors.

Using E2FSCk

  1. Step 1: An alternative method for checking file system errors is to use the e2fsck command. This command can scan the file system for any errors and correct them if necessary.
  2. Step 2: To use e2fsck, execute the following command: e2fsck -n /dev/mmcblk0pN This will scan the file system for any errors and provide detailed information about any issues found.

🎯 Final Words

In conclusion, while tune2fs -l can provide some basic information about the state of a file system, it is not reliable for detecting file system errors. A more robust solution for checking file system errors is to use e2fsck. By using e2fsck, you can accurately identify and correct any issues present in your file systems.

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