Consider a practical scenario, where your running MySQL server experiences a power failure. The next time you attempt to mount your database, you receive the below error message:

“InnoDB: If you get repeated assertion failures or crashes, even

InnoDB: corruption in the InnoDB tablespace.”

After the above error message pops up, the database becomes unmountable. This, further results in inaccessibility of all the records. In addition, the above error message appears every time you try to mount your MySQL database.

Cause:

As discussed in the error message, the InnoDB database tablespaces are corrupt due to improper server shutdown.

Resolution:

To resolve the above tablespace error message and to access the database, you will need to use follow the below steps:

·     Restart MySQL using innodb_force_recovery =  4 option.
·     Restart MySQL using innodb_force_recovery =  6 option.
·     Run ‘reiserfsck’ to fix corrupt file system.

However, if the above resolutions fail to resolve the above error message, then you will need to use an effective MySQL Repair tool to repair the database. Such MySQL Database Repair utilities can be downloaded from the Internet and used even by a novice user.

Stellar Phoenix Database Recovery For MySQL performs complete repair of corrupted MySQL databases after any corruption scenario. With repair of databases created in either of the storage engines (MyISAM and InnoDB ), the software supports  MySQL 5.x and 4.x. The non-destructive MySQL Database Repair utility is designed for Windows 7, Vista, XP, 2003 and 2000.

Consider a practical scenario, where you try and do a mysqldump, and encounter the below error message:

[root@www diaendomet]# mysqldump -ucojjohealth -p –all-databases >

alldatabases.sql

Enter password:

mysqldump: Got error: 29: File ‘../diaendomet/users.MYD’ not found

(Errcode: 2) when using LOCK TABLES

The same error message appears each time you attempt to run mysqldump. In addition, the mysqldump halts every time it encounters the above error.

Cause:

The fundamental cause for the occurrence of the above error message is corruption of MySQL database. Few main reasons for MySQL database corruption are improper system shutdown, virus attack, and application malfunction.

Resolution:

To resolve the above error message, you will need to run the below command:

“mysqlcheck –all-databases –auto-repair -ucojjohealth -p”

While the above command repairs corrupted databases in most cases, there is a possibility of getting a new error message after this command:

“error: File ‘../diaendomet/users.MYD’ not found (Errcode: 2)”

If you encounter the above error message, then your database has been corrupted badly. To repair your database in such situations, you will need to use third-party MySQL Database Repair tools. MySQL Recovery utilities provide advanced, complete, and risk-free database repair applications that repair damaged MySQL database while maintaining the intactness of data. These tools employ high-end scanning mechanisms to comprehensively repair the corrupted MySQL databases. With to-the-point documentation, the tools serve as self-explanatory and repair-centric tools.

Stellar Phoenix Database Recovery For MySQL is a efficient MySQL Database Recovery tool that supports recovery of databases created in both MySQL database storage engines – MyISAM and InnoDB. Compatible with Windows Vista, XP, 2003 and 2000, the read only software repairs and restores almost all MySQL components, such as, tables, primary key(s), and relations. Supported by MySQL 5.x, the tool provides Windows based recovery from MySQL database installed on Linux platform.

You might receive the below error with your MySQL Server database:

Write error on page of <database_name>: Input/output error”

You generally receive such errors while performing some general operations on database. The application crashes after you receive this error message.

One of the possible reasons for such errors to occur is database corruption. This might occur due to any of the below reasons:

• Storage engine bug
• One or more binary or libraries to which database is linked against is damaged, improperly configured or built
• Hardware malfunction

Solution

In order to repair the damaged MySQL database and its table, you should follow these steps in order:

• Execute the below command to determine if MySQL table is corrupted:

Check Table tablename

• If MySQL table reports corruption, run the following command to repair the damaged MySQL table:

Repair Table tablename

If you receive the same MySQL table corruption errors and applying above measures don’t help, you will need to use powerful MySQL Repair applications. Such MySQL Database Repair products incorporate advanced scanning algorithms to repair and restore the damaged MySQL tables completely. With exceptionally user-friendly and realistic user interface, these applications are quite easy to comprehend and so you don’t require any prior technical knowledge to use them. When you use these software, such utilities are competent to set a secure link with MySQL Server.

Stellar Phoenix Database Recovery for MySQL is the comprehensive and the most trusted MySQL Repair Database repair tool. This non destructive repair application supports both (MyISAM and InnoDB) MySQL database storage engines. It can completely restore and Repair MySQL components like tables, primary key(s) and relations. It is compatible with recovery from MySQL database installed Windows (Vista, XP, 2003 and 2000) and on Linux platform.

Consider a practical scenario, you try to open and access a MySQL database table and it fails to open. In addition, you receive the following error message:

“No more room in index file”

After this error message occurs, the data stored in the table can’t be accessed and you continue to receive the same error message in subsequent attempts of opening the table.

Cause

The above error occurs because you are trying to open a corrupted or damage database table.

Solution

To correct this problem, you need to apply these methods in order:

• You first need to access the database as Administrator and enter the password when prompted for.
• After this, you need to run integrity check on affected database table. To do so, you can use either of the commands:

1. CHECK TABLE tablename
2. myisamchk *.MYI
3. mysqlcheck *.MYI

• If it reports corruption, repair the damaged table using the following command with valid options:

1. REPAIR TABLE tablename

• Exit from the database by using ‘exit’ command

If you continue to receive the corruption issues, you should delete the damaged table if you have an up-to-date and valid backup. In case of backup issues, like backup corruption, unavailability or incompleteness, use MySQL Recovery software as the complete database recovery solutions. Such products are available with powerful scanning algorithms and they safely repair the damaged database. You can use these MySQL Repair tools in any case of MySQL database corruption.

Stellar Phoenix Database Recovery For MySQL is the premier MySQL Recovery tool. The software supports MySQL 5.x. The tool facilitates complete recovery of InnoDB (.ibdata, .ibd and .frm) and MyISAM (.myd, .myi and .frm) files. It can recover MySQL databases created on Windows as well as Linux platforms. The software is made for the Windows platform (Windows Vista, XP, 2003 and 2000).

You might receive the below error message with MyISAM table:

“Key in wrong position at page <page number>”

Cause

You encounter the above error message if the table is crashed due to corruption. A MyISAM table gets corrupt due to these reasons:

·     Hardware issues
·     Errors in MyISAM or MySQL code
·     Unexpected shutdown
·     mysqld process is killed while writing
·     Use of external program to modify a table that is simultaneously being modified by server

Solution

To resolve table corruption issues with MyISAM, you need to use these steps:

·     Check the MyISAM table health using CHECK TABLE command as:

CHECK TABLE table name

You can also check the table using myisamchk or mysqlchk command line utilities with valid options.

·     If CHECK TABLE reports that the table is corrupt, you should next repair the table with REPAIR TABLE command:

REPAIR TABLE table name

You can also make use of myisamchk or mysqlchk command line utilities.

·     Check the table for corruption issues. If it still reports corruption, check your last backup. If it is valid enough to restore, delete the damaged table and restore from backup.

·     If backup seems to be damaged or is not updated enough to give required information, you should use repair MySQL database software. These applications scan the damaged MySQL databases and repair them with original format and view. Such MySQL Repair applications are graphically rich products with impressive set of features.

Stellar Phoenix Database Recovery For MySQL is an advanced tool that repairs and restores corrupt MySQL tables. It supports MySQL 5.x. and can recover database files for both InnoDB (.ibdata, .ibd and .frm) and MyISAM (.myd, .myi and .frm) database storage engines. This MySQL Recovery software restores all database objects, including tables, relations, primary key(s), and others. It can recover databases created on Windows and Linux platforms and is compatible with Windows Vista, XP, 2003, and 2000.

You might receive the below error with your MySQL Server database:

Write error on page of <database_name>: Input/output error”

You generally receive such errors while performing some general operations on database. The application crashes after you receive this error message.

Cause

One of the possible reasons for such errors to occur is database corruption. This might occur due to any of the below reasons:

• Storage engine bug
• One or more binary or libraries to which database is linked against is damaged, improperly configured or built
• Hardware malfunction

Solution

In order to repair the damaged MySQL database and its table, you should follow these steps in order:

• Execute the below command to determine if MySQL table is corrupted:

Check Table tablename

• If MySQL table reports corruption, run the following command to repair the damaged MySQL table:

Repair Table tablename

If you receive the same MySQL table corruption errors and applying above measures don’t help, you will need to use powerful MySQL Repair applications. Such MySQL Database Repair products incorporate advanced scanning algorithms to repair and restore the damaged MySQL tables completely. With exceptionally user-friendly and realistic user interface, these applications are quite easy to comprehend and so you don’t require any prior technical knowledge to use them. When you use these software, such utilities are competent to set a secure link with MySQL Server.

Stellar Phoenix Database Recovery for MySQL is the comprehensive and the most trusted MySQL Repair Database repair tool. This non destructive repair application supports both (MyISAM and InnoDB) MySQL database storage engines. It can completely restore and Repair MySQL components like tables, primary key(s) and relations. It is compatible with recovery from MySQL database installed Windows (Vista, XP, 2003 and 2000) and on Linux platform.

You might receive the below error message with your MyISAM table:

“can’t find file:
.MYI”

Here, ‘tablename’ refers to the name of affected MyISAM table.

Cause

The index file (.MYI) of table is damaged or corrupted. It can get corrupt due to unexpected shutdown, improper locking of table, errors in MyISAM code, network errors, hard disk issues and similar other reasons.

Solution

To rectify the above issue, you need to perform these steps in order:

• First, you need to check the database table for corruption using one of the following commands with valid options:

1.  CHECK TABLE tablename

2.  myisamchk *.MYI

3.  mysqlcheck *.MYI

• If the above commands detect corruption, you need to repair the database. To accomplish the same, you can use following command:

1.  REPAIR TABLE tablename

2.  myisamchk *.MYI

3.  mysqlcheck *.MYI

Before you try to repair the table, it is recommended to take its backup.

• If you still receive the same corruption error messages, you should delete the damaged database table and restore the lost data from latest backup. But if you observe that database backup is not up to the mark, you need to use MySQL Recovery tools.

MySQL Database Recovery software are effective applications that are designed to scan and repair damaged MySQL databases. They offer advanced repair options, to-the-point documentation, interactive interface and different support options. These tools implement powerful scanning algorithms for efficiently repairing the affected database objects.

Stellar Phoenix Database Recovery For MySQL is the premier and most powerful MySQL Repair tool that offers efficient repair and restoration of damaged MySQL databases. It natively supports both InnoDB (.ibdata, .ibd and .frm) and MyISAM (.myd, .myi and .frm) files. The software is compatible with MySQL 5.x. It supports recovery from MySQL database installed on Windows as well as Linux platforms. This MySQL Database Recovery software is compatible with Windows Vista, XP, 2003 and 2000.

You might encounter the below error message with your MySQL database:

“126: Index file is crashed / Wrong file format”

After the occurrence of this error message, you face issues while accessing the table.

Cause

The above error message gets encountered due to the corruption of index file. As a result of which, when you attempt to run any query, it aborts unexpectedly as it can’t find the path to proceed. Index corruption can occur due to improper table locking, unexpected shutdown, application errors and other similar reasons.

Solution

To solve this issue, you need to follow these steps in sequence:

• First, you need to check MySQL table corruption. You can use CHECK TABLE statement, mysqlcheck command-line utility or myisamchk command-line utility. The latter two utilities can only be used with MyISAM tables and not with InnoDB tables. The basic syntax of these commands is as follows:

CHECK TABLE tablename

mysqlcheck dbname tablename

myisamchk dbname tablename

You can use appropriate options with them.

• If you experience errors related to table corruption, you need to repair the affected table. To accomplish the same, you can use REPAIR TABLE command as below:

REPAIR TABLE tablename

You can also use mysqlcheck or myisamchk command-line utilities, but only for MyISAM tables.

• If you continue to receive the same error messages, repair is beyond the scope of above utilities. Thus, you need to use an updated data backup to restore the complete database. But if no backup is available or the present backup is not valid to restore the lost data, you need to repair the damaged database with MySQL Database Recovery applications. These are special tools that use powerful scanning algorithms to safely repair and restore MySQL database components.

Stellar Phoenix Database Recovery For MySQL is the premier MySQL Repair tool that can instantly repair and restore corrupt MySQL databases. It supports both InnoDB (.ibdata, .ibd and .frm) and MyISAM (.myd, .myi and .frm) files. The software is compatible with MySQL 5.x. This MySQL Recovery software supports recovery from MySQL database installed on Windows as well as Linux platforms. It is compatible with Windows Vista, XP, 2003 and 2000.

You might encounter the below error message with your MySQL database table:

“141: Duplicate unique key or constraint on write or update”

·In MySQL tables, unique key is the constraint that is responsible for uniquely identifying each row in the table

Cause

The basic reason for the occurrence of this error message is inconsistencies of MySQL database table. It can happen due to unexpected shutdown and other similar causes.

Solution

To solve this issue, you need to follow these steps:

· First, you need to check the affected table for corruption. You can run CHECK TABLE command as follows:

CHECK TABLE tablename

The server must be running for the command to run. You can also use mysqlcheck or myisamchk command-line utility to check MySQL tables.

· If table check reports corruption, you need to repair it. You can use following command:

REPAIR TABLE tablename

mysqlcheck or myisamchk command-line utilities can also be used.

· If you still receive the same error message or the table is inaccessible, you can use your recent data backup to restore the entire database. However, if no backup is available or it gives certain corruption related errors during restoration or is incomplete, third-party MySQL Recovery applications can be used to repair and restore all the lost information.

MySQL Database Recovery tools are special utilities that can scan damaged MySQL databases and restore all their objects. They offer interactive interface together with advanced repair options. With read-only design and uniquely developed scanning algorithms, such MySQL Recovery applications provide complete database recovery.

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. The software is compatible with MySQL 5.x. It supports recovery from MySQL database installed on Windows as well as Linux platforms. It is compatible with Windows Vista, XP, 2003 and 2000.

Consider a scenario, where you are making certain modifications in the Marketing table. While doing so, you encounter a power outage and your system shuts down unexpectedly. After you switch on your system and try to open the table, the following error message gets displayed:

“Table is crashed and last repair failed”

The data saved in the Marketing table becomes inaccessible after the error occurrence.

Cause:

The reasons behind the above error message are:

· The table handler is unable to find Marketing.myi file.

· Unexpected end of the file due to power failure

· Some of the records in the Marketing.myi file have been crashed.

Resolution:

To resolve the above error message, you will need to repair Marketing.myi table by using these steps:

1. To check and analyze the corrupted table, use either of the two commands:

myisamchk Marketing.myi

Or

Check Table Marketing

2. To repair the corrupted table, use either of the two commands:

myisamchk -r -q Marketing (-r -q means “quick recovery mode”)

Or

Repair Table Marketing

But if the above repair commands fail to repair the Marketing table, you need to repair the table by using powerful MySQL Repair software. Such MySQL Database Repair applications incorporate advanced scanning algorithms to repair and restore the data stored in MyISAM tables. With user-friendly interface, this repair utility is easily understandable without sound technical skills. The repair tools also create a secure link with MySQL Server while repairing the corrupted MyISAM table.

Stellar Phoenix Database Recovery for MySQL is the most efficient MySQL repair software. This read only repair utility is compatible with both (MyISAM and InnoDB) MySQL database storage engines. It can completely restore and Repair MySQL components like tables, primary key(s), relations etc. It supports recovery from MySQL database installed on Windows (Vista, XP, 2003 and 2000) plus Linux on Windows platform.