Image via WikipediaWhile working with large databases, one often had to compromise on performance and time when there was a requirement for using only specific data from the large repository of data. It was important to limit or filter results of the queries that returned entire datasets from the SQL Server database. To overcome this problem, MS SQL Server used the paging technique to efficiently organize the data into small and manageable pages. These pages fail to function properly in case of a database corruption and you might not be able to implement any of the paging methods which may require you to go for database recovery.
There could be a number of reasons behind database corruption, such as virus attacks, power surges, improper shutdown etc. In such situations, you should take appropriate steps to recover your precious data from the corrupt database. If you are unable to recover the database, you should perform SQL repair by using a third party recovery software.
Sometimes the DBCC CHECKDB command may fail and return the following error message while performing a consistency check on one of your database tables:
"Table error: Object ID O_ID, index ID I_ID, page ID P_ID1. The PageId in the page header = P_ID2."
Most Possible Reasons:
This error may have occurred due to any of the following reasons-
There could be a mismatch between the page header of a requested page and some other page.
The database table on which the DBCC CHECKDB command was running may be corrupt.
When you try running DBCC CHECKDB using 'repair_allow_data_loss' option, it will show that the error is fixed even though it is not. When the DBCC CHECKDB fails to fix the error, you should try to perform SQL recovery through below mentioned resolution steps.
What You Need to Do:
These steps might help you solve the problem-
Check whether a hardware failure has caused the problem. You may be required to run hardware diagnostics.
Try using a backup to restore database to its original state.
If all the above mentioned resolution steps fail to solve the problem, you should take help of a reliable database recovery software in order to recover back your lost valuable data from the corrupt database. These software use efficient scanning algorithms that enable you to perform a faster recovery.
There could be a number of reasons behind database corruption, such as virus attacks, power surges, improper shutdown etc. In such situations, you should take appropriate steps to recover your precious data from the corrupt database. If you are unable to recover the database, you should perform SQL repair by using a third party recovery software.
Sometimes the DBCC CHECKDB command may fail and return the following error message while performing a consistency check on one of your database tables:
"Table error: Object ID O_ID, index ID I_ID, page ID P_ID1. The PageId in the page header = P_ID2."
Most Possible Reasons:
This error may have occurred due to any of the following reasons-
There could be a mismatch between the page header of a requested page and some other page.
The database table on which the DBCC CHECKDB command was running may be corrupt.
When you try running DBCC CHECKDB using 'repair_allow_data_loss' option, it will show that the error is fixed even though it is not. When the DBCC CHECKDB fails to fix the error, you should try to perform SQL recovery through below mentioned resolution steps.
What You Need to Do:
These steps might help you solve the problem-
Check whether a hardware failure has caused the problem. You may be required to run hardware diagnostics.
Try using a backup to restore database to its original state.
If all the above mentioned resolution steps fail to solve the problem, you should take help of a reliable database recovery software in order to recover back your lost valuable data from the corrupt database. These software use efficient scanning algorithms that enable you to perform a faster recovery.
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Advanced solution to fix extremely corrupted MDF files of MS SQL Server.
Download: Sql database recovery
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