In this article, we will look into the details of SQL Server Fatal Error 605 and the available fixes. At Bobcares, with our Microsoft SQL Server Support Services, we can handle your MSSQLServer issues.

MS SQL Server Fatal Error 605

Error 605 appears when a page or allocation corruption occurs in a particular database. When reading pages from a table, SQL Server identifies corruption by tracking page links or by using the Index Allocation Map (IAM). All pages assigned to a table must belong to one of the table’s allocation units.

The exception is thrown if the allocation unit ID in the page header does not match an allocation unit ID connected with the table. The first allocation unit ID provided in the error response is the one found in the page header, and the second is the one connected with the table. The errors can be:

• Severity 21: While detecting the expected allocation, this error message can cause major problems with the database page or the SQL Server engine.
• Severity 12: If the query execution fails when utilizing the read uncommitted isolation level. Or the NOLOCK query, which is often known as a “dirty read.”

How To Fix Error 605: Severity 21?

To fix this problem, restore data from the server backup file. If the backup file is missing, use the DBCC CHECKDB command to repair the data file. The following points will assist us in determining the root cause of this error:

• Examine all issues related to hardware and the system.
• Make sure that PAGE_VERIFY=CHECKSUM is enabled on SQL Server.
• If a SQL Server backup file is available, try to restore data.

How To Fix Error 605: Severity 12?

We should stick to the following the below points if the error severity is 12.

• Avoid using the reading uncommitted isolation level.
• During execution, do not make any changes to the current tables.
• Repeat the query until we no longer receive the error code.

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Conclusion

To conclude, we have seen the details of SQL Server Fatal Error 605 along with the methods from our Tech team to solve it.