How to Resolve SQL Server Error 601 NOLOCK

Summary: Data consistency is a very crucial aspect in a SQL database, and every DBA must ensure to maintain it properly. But sometimes there are situations when the database encounters locking issues or corruption. Further, it provides the SQL Server Error 601 NOLOCK. If you get this error message, then follow the free methods and the DatabaseFileRecovery SQL Database Recovery Tool in this blog. It will help you to fix the issue without complexities quickly and easily. Download Now Purchase Now

What is the NOLOCK SQL Server Error 601?

Whenever users see a message displayed as 

Msg 601, Level 12, State 3, Cannot Scan with NOLOCK Hint due to Data Movement. They get worried, and of course, it is a reason to worry, as the data is locked. Now, no operations can be executed in the database. It is one of the errors due to inconsistencies. Sometimes, it is also referred to as an issue of READ UNCOMMITTED Transaction Isolation Level. Some common reasons for the occurrence of this SQL Server 601 error are

• Memory and disk system/subsystem-related issues.
• Unexpected power outages or hardware driver problems.
• SQL Server Engine or network connectivity problems.
• Data is read concurrently, or SQL transactions aren’t fully committed.
• Dirty SQL data reads and inconsistencies prevail in the database.

Thus, it becomes very necessary to fix error 601 SQL Server instantly.

Troubleshoot Ways to Resolve SQL Server Error 601 NOLOCK

There are a few manual methods that can help you fix this error with some effort for free. However, the methods may have some drawbacks and are difficult and complex for non-techies. Additionally, in case they result in a loss. Then? For that, we have suggested a professional tool below, which will recover data in no time.

Manually Resolve SQL Server Error 601 

We will discuss three manual parts to eliminate error 601 from SQL databases. Dive deep into them to know what methods are there and how they work.

Part 1: Cancel or Kill Query Technique 

In this method, any user has only two options. The first is to cancel the query and resubmit it later, and the second is to kill it with the NOLOCK hint. The steps are:

1. Start SQL Server Management Studio and press Cancel to disrupt the query.
2. Further, a query is given below to resubmit it. Run the query:

SELECT   r.session_id SessionID,   r.blocking_session_id BlockingSessionID,   r.start_time,   r.status,   r.command,   t.text queryText FROM   sys.dm_exec_requests r   CROSS APPLY sys.dm_exec_sql_text(r.sql_handle) t WHERE   r.blocking_session_id > 0;

1. Finally, to kill the session blocking after receiving the inputs, run the Kill 34 command.

Part 2: Repair the Affected Database due to SQL Server Error 601 NOLOCK

The above task can result in data loss. So, users can use the DBCC CHECKDB to identify the error and restore the database with or without loss. The command to run is:

DBCC CHECKDB (SQLDB_NAME) WITH NO_INFOMSGS;

It will check whether the SQL Server database is corrupted. And it will also tell the inconsistencies (logical/physical) to rebuild the indexes. If any errors are found, then you can repair them with any of the following DBCC CHECKDB commands:

• DBCC CHECKDB (SQLDB_NAME, Repair_Fast) with no loss and little risk
• DBCC CHECKDB (SQLDB_NAME, Repair_Rebuild) // for minor fixes
• DBCC CHECKDB (SQLDB_NAME, Repair_Allow_Data_Loss) //with loss

Part 3: Fix SQL Database Error 601 by Recovering Database from Backup

Users can simply do this by executing two main Transact SQL (T-SQL) queries. These are:

For Data Backup:  BACKUP DATABASE SQLDB_NAME TO DISK = ‘f:\backups\sqldb_name.bak’ WITH FORMAT; For Data Restore: RESTORE DATABASE SQLDB_NAME FROM DISK = ‘f:\backups\sqldb_name.bak’ WITH REPLACE;

Alternatively, to resolve SQL Server Error 601 NOLOCK from backup, you can follow these steps:

1. First, begin the SSMS. Connect to the database instance and, in Object Explorer, pick Database.
2. Right-click it, and you’ll get many options. There, press Tasks and then Backup.
3. Now, simply configure the given options as per your needs. Further, declare a destination. Press OK.
4. When the backup completes and the .bak file is saved at a secure location.
5. Again, right-click DB, and from Tasks >> hit on the option Restore >> then Database.
6. Afterward, in the source, you need to opt for Device to choose the .bak file created earlier.
7. Later, set all the restore options as required, and finally, press OK to fix SQL Server Error 601.
8. Now, just verify the process, check data and log files are rightly placed, and test the restored database. 

The manual methods are finished. However, as said before, it is risky, so losses are possible. To avoid them, find the best solution below.

Automatically Handle SQL Server Error 601 NOLOCK

If you want an easy, reliable, secure, and instant way to recover a database in SQL Server. Then, use the DatabaseFileRecovery SQL Database Recovery. It will fix all your SQL errors and damaged MDF/NDF files. Also, it will restore them in the original form in a new database or as scripts on the local system. Moreover, you need not worry about data loss or formatting errors. Besides that, the tool is easy to operate, has the latest advanced features, and is realistic with a simple GUI. 

Steps to Fix SQL Database Error 601

1. Launch the software specified in this section and press Open in the window.
2. In it, you will see a (…) icon. Click it. In the open dialog, select the MDF SQL file to add.
3. Then, choose the recovery style from the given Standard or Advanced modes. Click OK.
4. Afterward, you will get a preview of all the records in the database file. Press Save SQL Data.
5. Set the location path for files and pick from the additional features given in the tool.
6. At last, click OK to resolve the critical 601 error code in SQL.

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Conclusion

To conclude, after going through the given solutions, I guess you have resolved the SQL Server error 601 NOLOCK. It can be tricky to fix the error sometimes, but the troubleshooting methods can help you resume the work. If the error seems to damage the file, then use a professional tool for a quick fix. 

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