MySQL Fix InnoDB Corruption Error- Easy Solutions

Summary: A corruption error in InnoDB means MySQL cannot read or process a table’s data correctly. It happens when the InnoDB storage engine checks the data on the disk. This data is stored in special files called tablespace files. However, when the engine finds that this data has been changed. And, the data is no longer in its expected, valid state. Because of this change that is made in a certain way, the engine cannot process. Moreover, the engine also cannot understand the altered data. This may prevent the file from being read. Thus, in this blog, we will learn several methods to MySQL fix InnoDB corruption. That will include an automated solution MySQL Database Recovery Tool.
Download Now Purchase Now

To begin with, we will learn the main causes and problems the user can face with this MySQL error.

The Common Causes of InnoDB Corruption

Before we learn how to repair InnoDB tables in MySQL, we must understand why these InnoDB corruptions occur:

• When we try to move or migrate files from/to MySQL, that does not commit properly. It leads to an inconsistent state within the data files.
• Bad sectors or failing storage devices can corrupt InnoDB data (ibdata1, .ibd, or log files).
• Sometimes force-killing MySQL data or abrupt reboots can damage InnoDB tables.
• As MySQL files are stored in the local system (ext4 on Linux, NTFS on Windows, etc.), and if the system fails or is corrupted, it could corrupt the database file too.
• Every change (Insert, update, or delete) is first recorded in the log files. And in Database logfiles works as a safety net (to keep the main file safe). However, if there is a significant change or transaction, it may cause InnoDB corruption.

These are a few most common reasons for MySQL InnoDB corruption. Let’s see how a user faces problems with this corruption.

Problems Users Face with InnoDB Corruption

Before embarking on a step-by-step guide to repair MySQL InnoDB table. We must understand how to identify that MySQL is showing an InnoDB Corruption error.

• MySQL Server fails to start & Startup is stuck with InnoDB-related errors in the log.
• Specific tables cannot be accessed. Moreover, users may see errors like:

InnoDB: Page corruption detected

ERROR 2013 (HY000): Lost connection to MySQL server during query

• Sometimes, when a user is accessing the corrupted table, MySQL restarts unexpectedly.
• Alongside, Web applications, ERP, CRM, or e-commerce sites relying on MySQL may go offline.

These are the major problems users can face with InnoDB Corruption in MySQL. Now, we will go through the real-time queries

Real-Time Queries to Recover InnoDB Corruption

My MySQL server suddenly crashed, and now it won’t start. In the error logs, I see messages like InnoDB: Page corruption detected and InnoDB: Unable to read page. I need to at least get the server running temporarily so that I can take a backup of the databases. What steps can I try to safely bring MySQL up without worsening the corruption, or is there any option to MySQL fix InnoDB corruption? Paco Quinn, IT Lead

After corruption, I’m able to access some tables, while others show errors when queried. My main goal is to export as much healthy data as possible and then rebuild the corrupted tables later. What is the optimal approach to MySQL Repair Table InnoDB? Sherry Ingler, Database Administrators

Best Techniques to MySQL Fix InnoDB Corruption

There are two main ways to fix MySQL InnoDB errors. The first is a manual method for mirror damage. On the other hand, the professional method is for major file damage. Let’s dive into the methods:

Manual Steps to Recover InnoDB Corruption

To start repairing the MYSQL files, it is suggested that users not start the manual repair directly. Yet they must first take a backup of a file to begin with.

1. Restart MySQL Service
• Firstly, Press Windows + R → type services.msc → press Enter.
• In the Services window, find MySQL Service,
• Then, right-click and choose Stop, Start, or Restart.
2. Enable InnoDB Force Recovery
• Now, open the MySQL configuration file (my.cnf or my.ini).
• Under the [mysqld] section, add the following line:

innodb_force_recovery=1

• After that, save the file and restart MySQL.
3. Export (Dump) the Corrupted Table
• If MySQL starts, dump the data with the following line:

mysqldump -u user -p database_name table_name > table_backup.sql

• Now, if there are multiple files, then list them with a Space.
4. Drop the Corrupted Table
• Then users need to drop the file from database with the following command:

mysql -u user -p –execute=”DROP TABLE database_name.table_name”

5. Restore the Table from the Dump File
• After that, try to restore the table with the dumped file:

mysql -u user -p < table_backup.sql

6. Turn Off Recovery Mode
• At last, go back to the .cnf file and remove or comment out the line:

#innodb_force_recovery=1

• Now save changes with the written line below:

service mysqld start

Users restart MySQL safely, back up the corrupted table, remove it, and then restore it from the clean dump. Although this method is foolproof for minor errors, if corruption is severe, MySQL might not start even in recovery mode. Moreover, sometimes the dump command may fail on heavily corrupted tables. Let’s discover the most prominent way to fix InnoDB table error in MySQL

Tried and Tested Way to Recover InnoDB Corruption

The DatabaseFileRecovery MySQL Database Recovery Tool is the best solution available to fix all the errors in MySQL file. This ultimate software comes with a user-friendly interface and a vast range of compatibility with different OS. Alongside the InnoDB table error, this straightforward software helps users recover MySQL databases from FRM and IBD Files. Users only need to go through the following simple steps:

Easy Steps to MySQL Fix InnoDB Corruption

1. First of all, run the MySQL Database Recovery Tool
2. Then, go to the Open option to add files.
3. After that, add the InnoDB file from the local system.
4. Now, preview and choose the folders to recover and press Save.
5. Then select the option of Save in Database or Save as Scripts.
6. At the end, press Ok to start the recovery.

By these 06 steps, users have repaired all the chosen MySQL files with ease.

Ending Notes:

Although the InnoDB table error seems quite difficult to know and solve. In this technical article, we have discussed the causes and problems a user can face with InnoDB errors. Moreover, we have also learned about the top 02 methods to MySQL Fix InnoDB Corruption. The first one is for mirror error, but for the major errors, users should follow the strong and reliable Database MySQL Database Recovery Tool.

Frequently Asked Questions

Related Post