{"id":5524,"date":"2018-06-27T11:16:22","date_gmt":"2018-06-27T10:16:22","guid":{"rendered":"http:\/\/wordpress.semnaitik.com\/?p=5524"},"modified":"2025-01-25T10:26:51","modified_gmt":"2025-01-25T09:26:51","slug":"troubleshoot-microsoft-sql-server-error-5171","status":"publish","type":"post","link":"https:\/\/wordpress.semnaitik.com\/blog\/troubleshoot-microsoft-sql-server-error-5171\/","title":{"rendered":"Microsoft SQL Server Error 5171 – Easy Troubleshooting Guide"},"content":{"rendered":"
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SQL Server stores the data in the form of pages in an MDF database. Each page has a specific size, 8 KB. The very first page is the file header page that contains the crucial information about the MDF file like file signature, file size, compatibility, etc. And the rest pages contain other information which includes the page allocation information and the actual data. If the header page or any other page in the MDF database becomes corrupt due to any reason, SQL Server fails to recognize the database file. Hence, you encounter Microsoft SQL Server error 5171<\/strong>.<\/p>\n<\/blockquote>\n

Unfortunately, there’s no computer application immune to errors or vulnerabilities. Microsoft SQL Server is a popular relational database management system (RDBMS). But the fact says that SQL Server is highly prone to errors. You’re likely to encounter an error message if there’s any sort of problem in SQL Server or its database (MDF). One of the most common error messages is Microsoft SQL Server error 5171, xxx.mdf is not a primary database file<\/em>. In this article, we’ll discuss this SQL Server error in detail, and also find out the best possible ways to troubleshoot it.<\/p>\n

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Microsoft SQL Server Error 5171 <\/strong><\/h2>\n

It’s very common to face corruption in SQL Server. Whenever corruption takes place, it may bring many problems along. The problems caused by corruption can affect the MDF database and its performance. Database corruption in SQL Server may put your data at high risk of loss. Sometimes it may happen that you encounter an error message while trying to attach an MDF database in Microsoft SQL Server. Below is the screenshot of the most common Microsoft SQL Server error 5171:<\/p>\n

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Whenever you encounter this SQL Server error, you should read the additional information. This will help you understand more about the problem you’re dealing with. The additional information says:<\/p>\n

“An exception occurred while executing a Transact-SQL statement or batch.”<\/em><\/strong><\/span><\/p>\n

It tells when the error occurs, i.e. what you were doing when this SQL Server error took place.<\/p>\n

“XYZ.mdf is not a primary database file.”<\/em><\/strong><\/span><\/p>\n

It tells why the error occurs. Just because the MDF database is corrupt, SQL Server doesn’t identify it as a valid file. Consequently, you come across this SQL Server error.<\/p>\n

Primary Reason for this SQL Server Error <\/strong><\/h3>\n

Database corruption is considered the primary reason for “Microsoft SQL Server error 5171”<\/em>. And when we talk about database corruption, we find many reasons responsible for it. Just have a look at the common reasons given below:<\/p>\n