The primary reason for this error is that the database drive may have become corrupted or reached its maximum capacity, causing the system to fail. This could be due to a hard drive failure or a misconfigured file system.An alternative cause could be an AppArmor issue, as you mentioned adjusting it

How do I fix: Checking AppArmor Configuration?

Step 1: Review the AppArmor configuration to ensure that it is correctly set up for the database drive.Step 2: Adjust or reset the AppArmor settings if necessary, and then reboot the server.Step 3: Verify that the changes have taken effect by checking the server's behavior after reboot.

Software⏱️ 3 min read📅 2026-06-15

How to Fix: MYSQL fails with: InnoDB: Operating system error number 30 in a file operation

Q: Step-by-Step Verified Fixes Checking and Rebooting the Database Drive?

Step 1: Check if the database drive is accessible via SSH to determine if the issue lies with the file system or another component.Step 2: Reboot the server and wait for it to recover from the error.Step 3: Monitor the server's behavior after reboot to ensure that the issue has resolved itself.

MySQL server experiencing intermittent errors due to file system issues, requiring reboot for resolution.

Quick Answer: Check the mounted drive's UUID and ensure it's not set to read-only mode. Consider running a disk check or replacing the drive if issues persist.

📋 Table of Contents

⚠️ Common Causes
🛠️ Step-by-Step Verified Fixes
🎯 Final Words

The MYSQL server is experiencing an error that causes it to fail with 'InnoDB: Operating system error number 30 in a file operation'. This error message indicates that the database drive is now in ready-only mode, and the server requires a reboot to get back up and running. The issue seems to occur periodically, lasting for several weeks before resolving itself after a restart.

This error can be frustrating as it disrupts the server's functionality and requires manual intervention to resolve. In this guide, we will explore possible root causes of this error and provide steps to fix it.

⚠️ Common Causes

The primary reason for this error is that the database drive may have become corrupted or reached its maximum capacity, causing the system to fail. This could be due to a hard drive failure or a misconfigured file system.
An alternative cause could be an AppArmor issue, as you mentioned adjusting it when adding the drive containing MYSQL over a year ago.

🛠️ Step-by-Step Verified Fixes

Checking and Rebooting the Database Drive

Step 1: Check if the database drive is accessible via SSH to determine if the issue lies with the file system or another component.
Step 2: Reboot the server and wait for it to recover from the error.
Step 3: Monitor the server's behavior after reboot to ensure that the issue has resolved itself.

Checking AppArmor Configuration

Step 1: Review the AppArmor configuration to ensure that it is correctly set up for the database drive.
Step 2: Adjust or reset the AppArmor settings if necessary, and then reboot the server.
Step 3: Verify that the changes have taken effect by checking the server's behavior after reboot.

🎯 Final Words

To resolve this issue, you can try checking and rebooting the database drive, as well as reviewing and adjusting the AppArmor configuration. If the problem persists, further investigation may be necessary to determine the root cause of the error.

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