By: Naveen Kadian
MySQL tables are the most critical component of the database that allows you
to store data in an organized manner. Thus, you can easily manipulate them and
get effective query results. But sometimes, these tables give unexpected results
and error messages. The reason could be table corruption, which needs to be
restored from backup. However, if backup falls short of restoring data, you
should use commercial MySQL Database Recovery applications.
You might receive the below error message in mysqld error log:
"[ERROR] Got error 127 when reading table "
You receive a series of such error messages.
Cause
The prime cause of this error message to occur is table corruption. A MySQL
table might get corrupt due to any of these reasons:
• mysqld process is killed unexpectedly
• Hardware issues
• MySQL
code or MyISAM/InnoDB code is suffering from bugs
• An external program and
server is modifying the same table at the same time
• Unexpected system
shutdown
Solution
To correct table corruption, you should follow these steps in order:
• You should first check the table for corruption using CHECK TABLE command.
To run the command, make sure that the server is running. This check is used
with following syntax:
CHECK TABLE tablename [options]
Here, options used are FAST, QUICK, MEDIUM etc.
• If CHECK TABLE command gives corruption errors, you should repair it using
REPAIR TABLE command. Before running the command, ensure that about twice as
much disk space as of affected table is present on disk. The syntax is as:
REPAIR TABLE tablename [options]
Here, options used are QUICK, EXTENDED etc.
• Again, check the table for corruption.
• If table still remains
corrupt, you should delete the damaged table if you have a valid database
backup.
• In case, no database backup is available or it seems to be damaged
or incomplete, make use of third-party MySQL Recovery utilities. These software
are specifically designed to scan damaged MySQL databases and correct corruption
errors. Designed to perform thorough database repair, these MySQL Database
Recovery tools provide advanced file repair functionalities, while maintaining
data integrity.
Stellar Phoenix Database Recovery For MySQL is the finest utility to repair
and restore damaged MySQL databases. It restores files created with InnoDB
(.ibdata, .ibd and .frm) and MyISAM (.myd, .myi and .frm) database storage
engines. It supports MySQL 5.x. This MySQL Recovery is compatible with Windows
Vista, XP, 2003, and 2000. It can repair databases created with both Windows and
Linux platforms.
Naveen Kadian is a self employed Internet entrepreneur and product reviewer
Stellar Phoenix Database Recovery For MySQL is the premier MySQL Repair tool
that can instantly repair and restore corrupt MySQL databases. It supports
InnoDB (.ibdata, .ibd and .frm) and MyISAM (.myd, .myi and .frm) files.
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