Resolving Mysql Error Code 145

Each MyISAM table is stored in three files, namely .frm for table format

, .myd for data, and .myi for table indexes. Corruption in these files is usually the result of system failure. When a MyISAM table doesn't close properly, it sometimes creates unavoidable situations of table corruption. The following discussion describes one of the commonly occurring error messages that might occur in such situations and the possible solutions that can be used to Repair MySQL Database.

Here, we have specified the problem of MyISAM table corruption with a related example. Consider a case when you create and maintain MySQL database that has been stored using its default storage engine, which is MyISAM. Then suddenly, you receive the following error message on your website:

"MySQL error code 145 = Table was marked as crashed and should be repaired."

The error might occur when attempt has been made be select or access some data from the corrupted table. The moment you encounter the above error, you should realize that some type of corruption exists with either .myi, .myd, or .frm file and needs to be fixed using appropriate tools.

Usually, such problems can be easily resolved by running database repair utility, but you should first check the integrity of database table(s). To do so, you need to run the below sequence of steps:

Make sure that the server on which database table is stored is running.

Execute the below command to check the consistency of table:

myisamchk table_name

Where, table_name refers to the name of table to be checked

If the table is reported as corrupt, repair it using the below command:

myisamchk -r -q table_name

This is a quick recovery mode to repair only the indexes of table. If this doesn't work, execute the below command.

myisamchk -r table_name

This command can delete the affected rows, making the table useless. So, it is recommended to take backup of your database prior to Repair MySQL database. To safely mysql database repair, use third-party utilities that can run effective and secure scanning algorithms to repair a corrupted MySQL database.

Database Recovery for MySQL is a high-end tool used to repair mysql database and its components. This risk-free tool can repair both MyISAM and InnoDB databases, while keeping their integrity. With restore capability for all tables, relations, database constraints, the software supports MySQL 5.x and 4.x.

by: Advika Singh

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