subject: How To Recover Corrupt 'ibdata1' File Of Innodb Storage Engine [print this page] MySQL is a popular and widely used Relational Database Management System, which uses different types of storage engines to store and manage data in the database. Among all other storage engines of MySQL application, InnoDB is the most powerful one. InnoDB storage engine uses 'ibdata1' file to store all your data. MySQL application uses log files to refer the parts of 'ibdata1' file. In case the 'ibdata1' file gets damaged,
your entire MySQL database becomes inaccessible. In such situations, you need to restore the database from current backup. In case the backup is not updated or available, you need to Repair MySQL Database to extract inaccessible and damaged data from it.
In a practical scenario, you may come across the below error message, when you attempt to recover an InnoDB database table after an unexpected system shutdown:
"Timeout error occurred trying to start MySQL Daemon.
Starting MySQL: [FAILED]"
Additionally, you may see the below entries in Application Event Log of MySQL:
InnoDB: Database page corruption on disk or a failed
InnoDB: file read of page 2.
InnoDB: You may have to recover from a backup.
100317 21:53:25 InnoDB: Page dump in ASCII and hex (16384 bytes)"
Cause
This problem occurs due to corruption to the 'ibdata1' file. The corruption may occur due to numerous reasons, such as virus infection, unexpected system shutdown, operating system malfunction, and user errors.
Resolution
In order to Repair MySQL tables in such circumstances, you need to restore them from the most recent backup. Backup is the redundant copy of your database, which helps you to restore database in case of failure.
If backup is not available, mysql database repair software come for your help. The applications are particularly designed to throughly scan entire database and Recover MySQL database in all cases of corruption. The applications come equipped with interactive and simple graphical user interface to enable easy recovery of damaged MySQL database.
Database Recovery for MySQL software repairs and restores MySQL database for InnoDB and MyISAM storage engines. It works well with MySQL 5.x and 4.x. The repair mysql software restores all damaged MySQL database objects, such as tables, reports, forms, views, constraints, and more.
