How to Get Rid of SQL Server Error 3313, 3314 & 3414

Overview

Microsoft SQL Server is Relational Database Management System (RDBMS). The primary function of this software product is storing and retrieving data as per request of other software applications installed on the same or other computers across a network (including the Internet). Just like other computer applications, SQL Server also incorporates some error messages with it. In this technical paper, we are going to discuss some common SQL Server errors and the techniques to resolve them easily. So, let us get started!

SQL Server Error 3313

Description: ‘Could not redo log record’ error occurs in SQL Server while redoing of a logged operation in database ‘%. This error occurs at log record ID %S_LSN. The particular failure is previously logged as the error in the Windows Event Log Service. This error places the database into a SUSPECT state. Error 3313 in SQL Server requires to restore the database from full backup or repair the entire database.

Note: The database cannot be recovered during the startup of SQL Server.

Resolution: Below are some solutions to Microsoft SQL Server error 3313.

Technique 1: Run Hardware Diagnostics

First, run the hardware diagnostics to correct all issue. Also, examine that the Microsoft Windows NT system, application log, and SQL Server log to find out the cause of hardware failure.

If there is persistent data inconsistency problems then, try to swap out various hardware components to isolate the issue. Make sure that write caching is not enabled on disk controller of your system. If you suspect that, this is the problem then, contact the hardware vendor.

Eventually, you may find it beneficial to switch to a new hardware system, including reformatting disk drives and re-installing the OS.

Technique 2: Restore from Backup

If the issue is not related to hardware and a complete backup is available then, restore the database from recent backup.

Technique 3: Run DBCC CHECKDB Command

If the backup is not available then, execute DBCC CHECKDB command without the repair clause to recognize the level of corruption. DBCC CHECKDB command is recommended to repair the corrupted database.

SQL Server Error 3314

Description: It is a rollup error to undo the recovery process. It occurs while undoing a logged operation in database ‘%. It occurs in log record ID %S_LSN. It places the database into the SUSPECT state. The primary and other filegroups are suspect and might be damaged. One can recover the database or file from the backup or can repair the database.

Resolution: First workaround to fix SQL Server error 3314 is restore the database from backup. The server is recommended to use the current backup file to restore the SUSPECT database. However, if the backup is not available then, go to the following solution:

  • Execute DBCC CHECDB command as an emergency repairing technique. For this run the below mentioned command:
  • ALTER DATABASE SET EMERGENCY

After setting the database to emergency mode, try to copy or move whole data (as much possible) to another database.

SQL Server Error 3414

‘SQL Server service not starting: Error Code 3414’ is an error message that occurs while logging in or start-up time when the automatic recovery of SQL database is not completed properly. This error is stated as follows:

sql recovery error

Note:The description of error 3414 can be found in the Event Log or ERRORLOG entry of SQL Server, while the database attempts recovery procedure and fails to do the same.

If SQL Server finds it hard to recuperate the scheduled database from a suspicious condition the error 3414 occurs. If the database recovery from SQL error 3414 becomes failed, this will update ‘sys.databases.state_desc’ and ‘SQL Server Management Studio’ both column status as a SUSPECT.

Resolution: The error message 3414 provides two choices:

  • “Restore from a recent good backup”
  • “Diagnose the recovery error and fix them”

Yet, to fix the issue, the alternative to restore from complete backup is good in some cases but if it is not possible; try the following alternatives:

  1. Utilize the Database Console Commands, rather ‘emergency repair’ procedure provided by DBCC CHECKDB
  2. Copy the healthy or recoverable data to another database

Note: Via above-mentioned technique, the operational consistency is not guaranteed.

Quick Tip: SQL Error 3313, 3314 and 3414 make database in Suspect Mode and you will not be able to access your database. To resolve these error quickly, you can use SQL Recovery Software for easy repairing of your database.

Summing It Up

In this article, we have discussed some easy techniques for troubleshooting error 3313, 3314, 3414 in SQL Server. It is recommended to execute the guidelines sequentially and carefully to avoid any kind of data loss condition or you can opt for a quick solution ie SQL Recovery Tool to recover database from Suspect Mode.

Easy Solution On How to Stop Growing Log File Too Big

In various organizations, huge SQL databases are equipped, which perform more than millions of transactions per hour. A SQL server database has data files and transaction log files. Data files store the user data and transaction log files store all the changes user made in the database and all the details of the transactions performed while making changes.

Now, the issue is that this feature of logging the details, every time changes are made in SQL server can not be controlled or stopped. This causes a grave issue when the size of SQL server overgrows. However, the way in which these log files grow and configure can be controlled. So, to avoid SQL server log file growing unexpectedly, consider any of the following methods given below. Also, to manage the large area size, it is good to shrink log file size, we will discuss the ways to resolve the same issue in this content.

SQL Server- Solutions to Stop Growing Log File Too Big

There are numerous ways for truncating sql ldf too big file. Some of the chief solutions have been provided in the following segment of this content.

  • Monitor default Size Limit: In case SQL ldf file is growing too big then, put a large default size limit on the SQL server, so that it does not expands automatically and overloads the SQL server database.
  • Using the Memory Units: Remember to configure the expansion of log files by making use of the memory units instead of percentage if the SQL transaction log file grows quickly.
  • Changing the recovery model: Simple Recovery model definitely helps in controlling and shrinking the log file size. Based on how crucial the data is, user can choose any of the following recovery models namely,
    1. Simple Recovery Model
    2. Bulk-logged Recovery Model
    3. Full Recovery Model

In the simple model, the most recent backup of the database of SQL server is recovered while in the bulk-logged or full recovery model, database can be recovered up to the point of failure. This recovery is done by restoring transaction log file.

By default, Full recovery model is set. Then, user has to regularly back up the transaction log files to prevent them from becoming too large and to remove inactive transactions from transaction log. Also, consider this when taking back up of .ldf files.

NOTE: If user is defragmenting indexes, make use of DBCC INDEXDEFRAG and not DBCC DBREINDEX. If DBCC DBREINDEX is used then, transaction log file might expand drastically.

Using manual solution:

If maintenance is not carried on regularly, log file size grows too big. Therefore, it is recommended to take these manual steps before it takes up all available disk space. Now, let us look at the method to shrink a SQL Database’s transaction log file:

  1. Firstly, Open the SQL Server Management Studio and then log in to the proper SQL instance.
  2. In Object Explorer tree, expand the Database folder >> select database with large .ldf file.
  3. After this, Create a full backup of database by right-clicking on it >> Select Tasks >> Back Up.
    • User should make sure that Backup type is set to Full then, Delete any existing destinations >> add a new Disk destination.
    • Browse a location with a lot of free disk space >> rename the backup file with the .BAK extension.
    • Choose the bullet option for Overwrite all existing backup sets on the ‘Options’ page.
    • Finally, user can click on the ‘OK’ button to start the process of taking backup of log files.
  4. Similarly, create a transaction log backup of the database in the same manner as done above.
    • Right-click on database >> Select Tasks >> Backup and assure that backup type is set to Transaction log.
    • Choose the bullet option for Overwrite all existing backup sets on the ‘Options’ page.
    • Finally, user can click on the ‘OK’ button to start the process of taking backup of log files.
  5. The closing step is the shrinking of transaction log files by right-clicking database >> Tasks >> Shrink >> Files

NOTE: User may repeat steps 3,4 and 5 until the .ldf file size becomes physically smaller.

Conclusion

In this content, we have discussed various solutions on how to truncate .ldf files if transaction file size becomes too large. This is necessary in order to manage data with ease. Manual method and some general solutions have been written in this content to enlighten users when they come across such issues while dealing with SQL Server.

Learn How and When to Shrink Transaction Log File

Transaction logs consist of the records regarding activities taking place on the server database to which they are associated. At one point of time, these files run out of memory to record any more logs. Therefore, it is necessary to backup logs so that they can be cleared off whenever required. Shrinking is of the many procedures used for managing the transaction log files. The following segment acts as a guide on when to shrink transaction log files and what are the best practices to adopt when you do so.

Whys and Wherefores of Shrinking Transaction Log

When transactions are concerned, there are going to be instances where there is lack of storage space. If a transaction file consists of unused space it can be regained for future use. Doing this reduces the unnecessarily growing size of a transaction log file. What is being done here is a procedure known as shrinking of the log file.

NOTE: It is only possible to shrink a transaction log file in a scenario where the database is in an online state and a virtual log is free. However, in certain cases until the next truncation a log cannot be shrunk.

Generally, the truncation process occurs on its own as part of the simple recovery model when a database it is associated to is backed up. In addition, it also occurs as part of the full recovery model where the transaction is backed up. Nevertheless, a number of factors can affect the truncation procedure and delay it.

How Does Shrinking Take Place?

The procedure of shrinking a transaction log file is nothing but the removal of one or more than one virtual logs that exist. The unit of the reduction in size is equal to a virtual log file.

This can better be understood with an example:

There is a log file of 600 MB that is divided into multiple portions, i.e. 100 MB of virtual log file each, which makes 6 of them. This is done because the size of a log can only be decreased with an increment of up to 100 MB each. The variation in sizes can be 500 or 600 MB and not 533 or 625 MB.

Any virtual log that consists of active log records, i.e. active virtual log – is a part of the logical log file. Therefore, such virtual logs cannot be removed.

Things to Remember

In order to performing the shrinking of log files, it is necessary to first monitor the log space then a sequence of two stages follow up, i.e. shrinking of log file and then monitoring the shrinking events that have taken place.

To monitor available log space:

  1. DBCC SQLPERF (Transact-SQL)
  2. Sys.database files (Transact-SQL) – Lets you see the – size, growth, and max_size columns in association to the log

To shrink a transaction log:

  1. DBCC SHRINKFILE (Transact-SQL)
  2. Shrink transaction log file via SSMS

To monitor shrinking events:

  • Event Class – Log File Auto Shrink must be used

When a transaction log is shrunk removal of virtual logs (inactive) takes place. Therefore, in order to remain on the safer side and ensure database integrity during the procedure, it is highly recommended that backups be maintained.

Tips for SQL Server Transaction Log Backup

  1. In order to truncate SQL Server transaction log files, you must have them backed up. Not having regular backups of the transaction log may result in filling up the disk space.
  2. A full backup is not recommended, as it does not include the transaction logs.
  3. Use of ‘BACKUP LOG’ must be made in order to backup transaction logs.
  4. If transaction logs are not to be backed up according to the Database Administrator, Simple Recovery is suggested.

Necessity Of Backing Up Tail Log When Restoring The Database

One of the features that have been incorporated with MS SQL Server 2005 and its newer versions is Tail-Log Backups, which is mainly associated with backup and restore of SQL Server databases using full or bulk-logged recovery models. In the article, we will be learning about the necessity of backing up Tail log when restoring the database of SQL Server.

What is Tail-Log Backup?

The Tail-Log Backups can be defined as the process to capture all the log records that have not been backed up (as the name suggests, the tail of the log). It is a feature that was introduced in SQL Server 2005 and its later versions. This form of log backup is mainly done to avoid loss of work and to make sure that the log chain is kept intact. It is necessary to have a backup of transaction log tail in order to start restore database operation to the point of failure. The tail-log backup will be the last backup of which one can use for the recovery purpose of database.

Though Tail-Log Backup proves to be quite beneficial in the cases stated above, there are situations that does not require Tail-log backup. They are:

  • There is no need of Tail-log backup if recovery point is already present in an earlier log backup
  • When the user needs to replace the database, that may include operations such as overwriting or moving database to different location
  • When User does not need to restore the database to a point of time after the latest backup of the database

Scenarios that Requires Tail-Log Backup During Restore

Here are some of the common scenarios where a tail-log backup is needed:

  1. When the database is Online
    • If the user wishes to perform restore operation of the online database, the first step is to back up the tail of the log. It is recommended to use ‘WITH RECOVERY’ option of the BACKUP T-SQL statement in order to avoid risk of having errors for the online database.
    • NORECOVERY can be used to back up the tail of the log and to keep the database in RESTORING state. It is useful when saving the tail log of the log before RESTORE operation or failing over to a secondary database.
    • User can use both NO_TRUNCATE and NORECOVERY options together to create a log backup, which will skip the log truncation and keep the database into RESTORING state in an atomic state
  2. When the database is Offline
  3. If the database is in offline state and fails to start, user needs to restore the database by creating backup of the tail of log. It is optional whether to use WITH NORECOVERY or not, as no transactions can occur during this time.

  4. When the database is damaged
  5. In case of database that is damaged, user can take tail-log backup with the help of WITHCONTINUE_AFTER_ERROR option of the BACKUP statement. Another option is to use CHECKSUM

Note: Backing up the tail-log on a damaged database will only succeed if the log files are in healthy state, the database is in the state that supports tail-log backups and no bulk-logged changes is present in the database. If the tail-log backup cannot be created, any transactions committed after the recent log backup will be lost. In such scenario you can take the help of third party SQL database repair to recover lost SQL database.

Tail-Log Backups with missing Backup Metadata

As discussed in the above section, the tail-log backups have the capability to capture the tail of the transaction log in case of the offline database, missing data or damaged files. It might lead to incomplete metadata from the restore information commands and msdb. Even though the metadata may be incomplete, the log that has been captured is complete and usable.

  • If the tail-log backup has incomplete metadata, the values of the columns of has_incomplete_metadata and HasIncompleteMetadata are set to 1.
  • If metadata in tail-log backup is incomplete, the backupfilegroup table will be missing most of the information related to filegroups during the tail-log backup. The table backupfilegroup will contain several columns that are having null values.

Conclusion

It can be concluded that there is a high necessity of backup up tail log when restoring the database in SQL Server. If the user does not backup the tail of the log, any transactions may be lost that has occurred since the last backup of the database. The article has discussed about tail log backup and the scenarios where backup of the tail log is needed for restoring the database.