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Solutions for SQL Server Error code 823

SQL Server users often face error code 823, which is a critical SQL error. This error can disturb the consistency of server files, and so it should be treated immediately.

Reasons for SQL Server Error code 823

This error occurs when SQL Server declines Input or Output command; simply, the server fails to accomplish an Input or Output operation. The SQL Server makes use of Application Programming Interface or API to coordinate with Windows OS in order to accomplish these operations. However, if there are some conflicts with the API during an operation, the server instantly displays error 823. This error is of two types—Operating system error and Output/Input Logical Check Failed. And there are various reasons for the incompatibility between API and the server. Some of them are:

  • STEP 1: User errors
  • STEP 2: Hardware corruption
  • STEP 3: System corruption
  • STEP 4: Virus invasion
  • STEP 5: Corrupt Database files
  • STEP 6: SQL Server update or reinstallation
  • STEP 7: Inconsistency in system files
How to deal with SQL Server Error code 823?

Fixing operating system level error is not that simple when users opt for manual recovery. It requires lot of time and patience. Users must contact their hardware and administrative vendor to fix this error. Also, perform the below given actions to eradicate the error:

  • STEP 1: Run DBCC CHECKDB statement on the corrupt database
  • STEP 2: Scrutinize the suspected pages
  • STEP 3: Verify the consistency of the database
  • STEP 4: Restore database from the backup files
  • STEP 5: Check Windows Application Event Log

If the SQL Server error still shows up, then make use of a third-party SQL recovery tool like Kernel SQL Recovery to repair corrupt files, eliminate errors and produce fresh files. This tool is user centric and offers ingenious features to remove SQL errors and restore the database. It follows a simple and quick process to fix the error 823:

  • STEP 1: Install and launch the Kernel SQL Recovery tool. Select the SQL database files to be recovered and click the ‘Recover’ button.
    Error Log

    Note: In case, the user is not aware of the version of their files, check the ‘Auto detect database version’ checkbox.

  • STEP 2: After recovery, preview the recovered files and verify their content. Select the files which you want to restore and click the ‘Save’ button.
    Error Log
  • STEP 3: Provide the login credentials and click ‘OK’. The restoration of files starts.
    Error Log
  • STEP 4: After successful saving, a confirmation will be displayed on the screen.
    Error Log



SQL Server Error code 823 is a common issue faced by SQL Administrators. Though they can try to fix this error manually, many administrators use professional Repair MDF tool.

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