The most basic unit of storage in SQL Server is a page, which has a size of 8 KB. One of the page types is the IAM (Index Allocation Map) page that holds information regarding extents. The page contains location information of first eight pages. The IAM pages are mixed pages, but they do not reference among themselves. Besides this, an IAM page contains an array of mixed pages of eight page Ids, to hold these pages that are allocated to the index. However, sometimes the database may report corruption errors in these IAM pages. These pages can get corrupt due to various reasons such as hardware issues, human errors, virus infections, etc. In such cases, you should preform appropriate measures to resolve the issue. However, if you are unable to address the case then you should use a third-party MS SQL repair software to perform SQL repair of corrupted database components.

Consider a scenario wherein you are working on a SQL Server 2000 database and you encounter the following error message:

“Page P_ID in database ID DB_ID is allocated to both object ID O_ID1, index ID I_ID1, and object ID O_ID2, index ID I_ID2.”

Cause:

The IAM page has got inconsistent and, thus, database is corrupted. Following two cases are happening in this case:

Two different indexes have P_ID page in one of the IAM page's mixed page array.

The P_ID page is allocated to two different sets of Ids. These two sets should match

Resolution:

To resolve this error, you should perform the following methods:

Look for hardware failure: Run hardware diagnostics and check the error logs to ascertain whether the error has occurred because of any hardware issues. You can also swap the hardware components to zero-in on the cause and then rectify it. You can also consider switching to a new hardware configuration altogether.

Restore from backup: Restore the database from its backup, provided it is clean and updated.

Run DBCC CHECKDB: Run the DBCC CHECKDB utility without any repair clause to know the extent of corruption. Then, run it again with the recommended repair clause.

However, if none of the aforementioned methods are able to resolve the error then you should use a third-party MS SQL database repair software to repair SQL database. These highly interactive tools recover corrupted SQL databases without overwriting the original data.

SQL server recovery software is an MS SQL repair software that enables you to repair SQL databases created in SQL Server 2000, 2005, and 2008. It repairs corrupted database components such as tables, stored procedures, defaults, database constraints, etc. This SQL repair tool is compatible with Windows 7, Vista, Server 2003, XP, and 2000.