How to Resolve SQL Server Error 3456 Severity 21 State 1

Microsoft SQL Server, like any other RDBMS, is prone to multiple errors and bugs. It is really frustrating to deal with some of them. If left untouched, you may face serious problems. One such error makes your database go to SUSPECT state. SQL Server Error 3456 disables any access to the database because the primary DB file may have been damaged.

The error message 3456 is as follows:

Could not redo log record (#),  for transaction ID (#), on page (#), database ‘dbname’ (database ID #). Page: LSN = (#), allocation unit = #, type = #. Log: OpCode = #, context #, PrevPageLSN: (#). Restore from a backup of the database or repair the database.

This is the error which generally occurs while trying to access a damaged database. This SQL Server error 3456 is generally associated with failure to connect with the primary database file. In this article, we will be providing you with both the reasons behind the error as well as various solutions to resolve this SQL Server 14.0.3456 issue.

Different Causes of Error 3456 in SQL Server

There are multiple reasons that can be responsible for SQL database to go in ‘Suspect’ mode. The major ones are listed below:

• Transaction log file is damaged or corrupted
• Improper/forced shutdown of the SQL server
• Sudden restart when transactions were being processed resulting in its SQL Database Corruption.
• SQL server database has low or no disk space
• A virus attack or bug issues affecting this Microsoft application

After understanding these reasons, you can say that the general scenario resolves around transaction log files. So, let us find out how to resolve this problem.

Also Read:- Method to Fix Recovery Pending state in SQL Server Safely

SQL Server Error 3456 Severity 21 State 1: Resolved

SQL Server error 3456 places the database into the suspect mode. There are the following ways to resolve error code 3456 using the following ways:

• Recovery from Recent Backup File
• Use DBCC CHECKDB Command
  
• SQL Recovery Software

Also Read :- Tricks to Resolve SQL Server Error 5172

I. Restore Database from Backup

This is the go-to method for any kind of corruption issue in Microsoft SQL Server. But then again you can perform a restore only if you actually have a backup. Anyways, to perform the restore operation, read the given instructions:

Step 1. Launch SQL Server Management Studio(SSMS). Here, go to Databases >> Restore Database

Step 2. In the next window, click on browse(…) button to add a device

Step 3. Now, select your backup source device here. If there is no device present, click on Add button

Step 4. Now, locate and choose the backup file, then click OK

Step 5. Verify the destination and click OK to initiate the restoring process & fix “could not redo log record” issue.

II. Using Database Console Commands (DBCC)

In case, you don’t have a backup, you can go for this method to fix SQL server error 3456 issue. However, it is advised to take backup of the data before executing the given steps. Because using this way leads to data loss which can be severe in many cases.

Step 1. Launch SSMS and connect with your database

Step 2. Click on the New Query button

Step 3. Type the Scripts as shown below:

EXEC sp_resetstatus [Database Name];
ALTER DATABASE [Database Name] SET EMERGENCY
DBCC CHECKDB ('[Database Name]')
ALTER DATABASE [Database Name] SET SINGLE_USER WITH ROLLBACK IMMEDIATE
DBCC DATABASE('[Database Name]', REPAIR_ALLOW_DATA_LOSS)
ALTER DATABASE [Database Name ] SET MULTI_USER

Note: Replace [Database Name] with your original database file name.

Step 4. Finally, click on Execute. If it was only a minor corruption, your database should not be tagged as suspected anymore.

III. Using SysTools Advanced Solution

If you cannot afford data loss and don’t have any timely backups, you can go for SQL Database Recovery Tool. It fixes damaged database and successfully recover data from a suspect mode database.

Steps to Fix SQL Server Error 3456 Professionally

Step-1. Run the software utility. Click on Open and add the suspect database MDF file

Step-2. Choose Quick Scan for minor corruption recovery or Advance Scan for major corruption recovery.

Checkmark the Auto detect SQL server file(.mdf) version and click on OK button to move further in fixing the could not redo log record error.

Step-3. The utility will scan the database. Once done, click on Export button

Step-4. Choose export to SQL Server Database or as .csv script. Provide Authentication and click Export

Step-5. An acknowledgement window will confirm the process completion. You can now access the database on SQL Server without issues.

Conclusion

In this article, we discussed the SQL Server error 3456 which makes the SQL Server Database fall into suspect mode. We also got to know the causes and various solutions related to this error. The manual approaches are restoring the backup file and using database console commands. However, if none works for you, SQL Recovery Tool is always there to fix any kind of issues with your database without any form of data loss.

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