DataNumen SQL Recovery

DataNumen SQL Recovery is the best SQL Server recovery tool in the world. It can repair the corrupt or damaged MDF database files and recover as much of your data as possible, thereby minimizing the loss in file corruption.

SQL Server Errors and Problems

Complete List of Errors and Problems in SQL Server MDF Database Files

When you use Microsoft SQL Server to attach or access a corrupt MDF database file, you will see various error messages, which may be a bit confusing to you. Therefore, here we will try to list all possible errors, sorted according to their occurring frequency. For each error, we will describe its symptom, explain its precise reason and give sample files as well as the file fixed by our DataNumen SQL Recovery, so that you can understand them better. Below we will use ‘xxx.MDF’ to express your corrupt SQL Server MDF database file name.
Based on SQL Server or CHECKDB error messages, there are three kinds of errors that will cause failure:

1. 1. Allocation errors: We know the data in MDF & NDF files are allocated as pages. And there are some special pages that are used for allocation management, as follows:

If any of the above allocation pages have errors, or the data managed by these allocation pages are inconsistent with the allocation information, then SQL Server or CHECKDB will report allocation errors.