Know the Finest Way to Run DBCC CHECKDB Repair_Allow_Data_Loss

“I was running SQL Server but suddenly I got this error message “DBCC CHECKDB REPAIR_ALLOW_DATA_LOSS”. I was unable to understand what to do next. In fact, I searched for many solutions but, unable to figure out what is the main problem with the SQL database. Can anyone suggest me a dependable approach to fix this problem? Thanks in advance!”

The DBCC CHECKDB command is executed on SQL Server to check the logical and physical integrity of all objects in the database. These components may include pages, values, index relationship, tables, and triggers. This procedure involves many structural integrity checks. In case, any check fails while running the DBCC command, the application may encounter an error message. Due to various problems, there is a need to run SQL DBCC CHECKDB Repair_Allow_Data_Loss command on the database components. Therefore, in the upcoming section, we are going to discuss an instant and reliable solution to fix this issue. Before proceeding, we will show the screenshot of SQL syntax:

Also Read: How to Deal With DBCC CHECKDB Job failed in SQL Server issue

Table of Content

• Resolve DBCC CHECKDB Repair_Allow_Data_Loss Manually
• Automated Software to fix Database Corruption Issues
• Conclusion
• FAQs

Method to Resolve DBCC CHECKDB Repair_Allow_Data_Loss

Go through the following technique by which users can fix SQL server with corruption issues. Let us have a look:

When setting up a database in an emergency mode using ALTER DATABASE statement, DBCC CHECKDB command will perform specific types of special fixtures on the database if this option REPAIR_ALLOW_DATA_LOSS is specified. These allow unrecoverable databases to bring them back online at the consistent state. This must be used as a last resort and only when you are unable to restore the database from backup. When the whole database is set to emergency mode, the database is marked as READ_ONLY, logging is disabled, and limited access to members of the sysadmin fixed server role.

When the SQL database stuck in emergency mode and DBCC CHECKDB REPAIR_ALLOW_DATA_LOSS steps are executed, the following actions are to be taken:

• DBCC CHECKDB uses all pages that have been marked as inaccessible because of checksum or I/O errors if such errors cannot occur. It will also increase the chances of data recovery from a database.
• DBCC CHECKDB attempts to restore the SQL database by using log-based recovery technique.
• Due to transaction log corruption, the database restoration is not possible and transaction logs are being rebuilt. Rebuilding the transaction log files may result in a lack or issues in transaction consistency.
• If DBCC CHECKDB succeeds, the database comes in a consistent state and its status is set to online. Although, the database contains more than one transaction inconsistencies. It is highly recommended you can run DBCC CHECKCONSTRAINTS to recognize every business flaws and keep the database backup instantly. In case, if DBCC CHECKDB command fails, the database cannot be retrieved.

Is there any Smart Solution to Fix SQL Database Corruption?

If users are unable to implement any of the stated methods using DBCC CHECKDB REPAIR_ALLOW_DATA_LOSS, they can opt for an automated solution SQL Recovery Software. This utility can help users avoid DBCC repair_allow_data_loss cmd and go for a better alternative.

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With the help of this tool, users can get rid of corruption issues in both MDF and NDF files. The users can also restore deleted SQL Database tables without any data loss. Additionally, it is capable enough to bring back all tables, triggers, stored procedures, functions, views, rules, and corresponding Primary Key. This software is compatible with all Windows versions including Win 10. Furthermore, learn how to remove corruption from SQL Server here:

1. Download and Install the software on your PC.
2. From the menu bar, click the Open button to browse and open the specific MDF file from its location.
3. Choose Quick Scan for normal database corruption. This option will be used to scan MDF files.
4. Check Auto-detect option, if you automatically want to detect SQL Server version of MDF file.
5. After that, you can preview all the components of MDF or NDF file.
6. Finally, you can successfully export the .mdf file with the only Schema or with Schema & Data.

Time to Conclude

Microsoft SQL is one of the major platforms used to manage and keep data safe. However, while executing DBCC, the application will report an error message “DBCC CHECKDB REPAIR_ALLOW_DATA_LOSS”. Thus, in this blog, we have discussed two manual methods through which one can resolve this issue.

If the manual technique fails to fix corrupt SQL database files, then you can take help of modern tool. It is the best solution which helps to rectify damaged, lost, or deleted SQL database successfully. It is capable enough to auto-fetch SQL server name while moving to the SQL database.

Frequently Asked Questions