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Tag: corrupted table

Recover Corrupted Or Crashed MySQL Database Online

Earlier, we blogged about ways to recover corrupt MySQL database with the TwinDB Data Recovery Toolkit. However, the learning curve of the toolkit is rather steep. It takes time to get familiar with the InnoDB internals and the tool itself. And let’s be honest, nobody’s ever prepared for data loss – people who prepare for disaster […]

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Resolving Page Corruption In Compressed InnoDB Tables

Sometimes corruption is not what is seems. Corruption in compressed InnoDB tables may be a false positive. Compressed InnoDB tables may hit a false checksum verification failure. The bug (http://bugs.mysql.com/bug.php?id=73689) reveals itself in the error log as follows:

InnoDB complains about a stored checksum being a zero. If you look closely, you’ll find it […]

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Recovering A Corrupt MySQL Database

UPDATE: We announced online data recovery from corrupt databases. Check it out on https://recovery.twindb.com/ The unDROP for InnoDB tool can be used to recover corrupt MySQL databases. In this post, we will show how to repair a MySQL database if its files got corrupted and even innodb_force_recovery=6 doesn’t help. The corruption of InnoDB tablespace may […]

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Repair Corrupted InnoDB Tables With Secondary Index Corruption

UPDATE: We announced online data recovery from corrupt databases. Check it out on https://recovery.twindb.com/ UPDATE (01/01/2017): We stopped further development of undrop-for-innodb and don’t support its open source versions anymore. InnoDB provides no means to repair corrupted table space. Once a table got corrupted, the only way to repair MySQL files is to start it […]

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