%1 (%2) %3Database %4 requires logfiles %5-%6 (%8 – %9) in order to recover successfully. Recovery could only locate logfiles up to %7 (%10).

Product: Exchange
Event ID: 453
Source: ESE
Version: 8.0
Message: %1 (%2) %3Database %4 requires logfiles %5-%6 (%8 – %9) in order to recover successfully. Recovery could only locate logfiles up to %7 (%10).

This Warning event indicates that the database requires log files that could not be located. The database requires log files in order to continue.

You will see the following phrase in the event description: Information Store number GUID Database path\filename requires log files (for example) 154-158 in order to recover successfully. Recovery could only locate log files up to (for example) 157.

There are several possible causes of this event. They are as follows:

  • An online restore fails because the log files are missing from the temporary folder that is specified in the Microsoft Windows Backup program under the temporary location for log files.

  • A hardware failure causes loss of log files in the log file sequence needed for the restore.

  • Antivirus software has quarantined the current log file, E0n.log.

User Action

To resolve this warning, do one or more of the following:

  • Verify whether the log files have been moved or deleted. If the log files have been deleted, restore them from backup media. If they have been moved, move them to the appropriate location. The event Description will specify the required files.

  • Check for related events and their description to determine specific causes and resolutions.

  • Try to locate the missing log files, put them in the appropriate folder and run eseutil /cc (hard recovery) or run eseutil /cc /t to specify another location for all the necessary logs together in one folder, and then mount the database.

  • If the log files cannot be located, restore from an earlier backup, or as a last resort, repair the database, run isinteg -fix. Then, use Move Mailbox to put the results to a blank database.

  • Stop the antivirus software that is scanning the Exchange store files directory, and check the registry settings for the antivirus software. Put the current log file back in the appropriate directory. Make sure that you have correctly configured your antivirus software. For more information, see the Microsoft Knowledge Base article 328841, Exchange and Antivirus Software.

If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.


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