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How to Repair Corrupt SQL MDF File? – Query Resolved Here

Nilesh Kumar | Modified: 2021-09-09T10:51:21+00:00|SQL Server | 5 Minutes Reading

The MDF file is a primary database file in SQL Server that contains the database schema and data. If the MDF file is corrupted or inaccessible, the situation is the worst for the user or organization. Due to corruption, users can not open and access their individual data. Therefore, the user must repair corrupt SQL MDF file to access data. To fix this problem, we are here with the top solutions to recover MDF file. Before we go to the solution, we need to know the reason for the corruption so that the issue can be easily rectified.

 

User Query

Hello, My SQL Server data file is corrupt and I have no backup of the database. But it seems there is no problem in the log file (ldf). Can someone please help in recovering data from corrupt MDF file? Can anyone suggest me how can I recover corrupt MDF file? I have already tried DBCC CHECKDB repair options but no success. Please help.”

Causes of MDF File Corruption

  1. If a user has the SQL database stored in a compressed folder
  2. Any changes are made to a SQL Server account
  3. Damage to the storage medium on which all MDF files are stored
  4. If the file header is damaged, the MDF file will be corrupted
  5. If the SQL database is used and a network error occurs in the middle
  6. Hard drive failure, virus attack, sudden power failure, improper system shutdown, etc.

Repair Corrupt SQL MDF File Using DBCC CHECKDB Command

Steps to recover corrupt MDF files via DBCC command are as follows;

1. Run DBCC CHECKDB Command

DBCC CHECKDB (Name of the corrupt Database)

2. Next, check the index ID

  • If index ID > 1, drop it and create it again.
  • If index ID is either 0 or 1, then run DBCC CHECKDB again with the appropriate repair options like repair_rebuild, repair_fast, or repair_allow_data_loss.

DBCC CHECK (name_of_corrupt_database, repair_fast)

DBCC CHECK (name_of_corrupt_database, repair_rebuild)

DBCC CHECK (name_of_corrupt_database, repair_allow_data_loss)

When DBCC CHECKDB Command Does Not Work?

This command is unable to fix major MDF file corruption. If you need to fix several MDF files, this process may fail. Moreover, you need strong technical knowledge to perform this manual solution. Overall, the above process is complex, does not give a 100% guarantee for recovery, and takes a long time. For avoiding all these issues and professionally recover MDF file, you can use some alternate solutions.

Repair Corrupt SQL MDF File Using SQL Recovery Software

Recover SQL Database Tool is a proven solution to recover corrupt MDF file. This tool offers the option to recover and restore deleted SQL database with all objects such as tables, triggers, rules, etc. It lets you recover deleted database in SQL Server without backup. Once the data is recovered you can also save the database as CSV file, or as SQL Compatible script. The tool also allows you to export the recovered data into SQL Server present in the same machine or over a server network. More so, the tool support to repair MDF files created in any version of SQL Server.

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Follow these simple step to recover MDF file SQL Server 2019, 2017, 2016, 2014, 2012

Step 1. Download and Launch the tool. Then click Open to load .mdf files.

add-mdf-file

Step 2. Choose Scan Mode “Quick” or “Advance“. Also, check the “Auto detect” box to detect the SQL MDF file version.

Repair Corrupt SQL MDF file

Step 3. After the scanning process, click the database objects to preview.

Recover MDF File

Step 4. Choose Export to “SQL Server Database” and enter the credentials of your SQL account.

Recover Corrupt SQL MDF File

Step 5. Select the destination where the SQL database file should be restored to a “new or existing database“.

Restore MDF File

Step 6. Select Export With Only Schema” or “With Schema & Data”. Now, click on the “Export” button.

Why Prefer Recovery Tool to Recover Corrupt MDF File?

The manual process does not always help you repair corrupt SQL MDF file, as there are some limitations. Therefore, the recovery software is the good choice to repair MDF file perfectly and with full warranty. The tool mentioned above has various features and those are:

  • User-friendly control panel
  • 100% virus-free
  • Recover MDF as well as NDF files
  • Multiple Export options
  • Repair and recover deleted records
  • Restore selected database items
  • Works on all Windows platforms
  • Also, supports MDF file of SQL Server 2019

Read More: Fix SQL Server Database Not Accessible Problem

Concluding Words

We know how important SQL databases are, and any corruption in MDF is intolerable. To repair corrupt SQL MDF file, we have suggested the best software. Because using the manual process, it is not possible to fix major corruption issues. So, it is better to use the tool recommended by an expert and get a fruitful solution to recover corrupt MDF file.

Frequently Asked Questions

Can I repair MDF file without backup?

Using SQL database recovery tool, you can repair corrupt MDF file without backup.

Does it is possible to repair damaged MDF file with all objects?

Yes, SQL repair software allows you to repair MDF with all database objects like tables, stored procedures, rules, etc.