() Database requires logfiles – in order to recover successfully. Recovery could only locate logfiles starting at .

Details
Product: Exchange
Event ID: 452
Source: ESE
Version: 6.5.6940.0
Component: Microsoft Exchange Extensible Storage Engine
Message: <process name> (<process id>) <storage group name>Database <name> requires logfiles <number><number> in order to recover successfully. Recovery could only locate logfiles starting at <number>.
   
Explanation

One or more log files is missing. The recovery process of the database requires log files to continue.

You will receive the following phrase in the event Description:

Information Store (number) [guid] Database [path\filename]

requires logfiles [e.g.] 26709-26712 in order to recover successfully. Recovery could only locate logfiles starting at [e.g.] 26713.

Causes of missing logfiles are many and varied. Some common causes are listed below.

  • Cause 1 – An online restore fails due to logfiles missing from the temporary folder that is specified in the Microsoft Windows 2000 Backup program under temporary location for log files.
  • Cause 2 – A hardware failure causes loss of logfiles in the logfile sequence required for the restore.
  • Cause 3 – After repairing the priv1.edb database with Eseutil /p, you receive Event ID 454 when trying to start the public information store. The errors indicate that a problem is occurring when trying to replay the log files when the public information store is trying to mount. This error can occur if after running eseutil /p against priv1.edb, you do not remove the transaction logs. Then if you do not run eseutil /p against pub.edb, the pub1.edb file is looking for a different set of log files than the priv1.edb file. Therefore, Event ID 454 reports the files as “missing”.
   
User Action

Generally, verify whether or not 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 text will specify the required files.

Here are some specific resolutions for the common causes above.

  • Resolution 1 – Attempt to locate the missing logfiles and place them in the appropriate folder and run Eseutil /cc (hard recovery) or run Eseutil /cc /t (using the /t switch) to specify another location for all the necessary logs together in one folder and mount the database. If the logfiles cannot be located, restore from an earlier backup or as a last resort, repair the database, run Isinteg -fix, and ExMerge the results to a blank database.
  • Resolution 2 – Restore from an earlier backup or as a last resort, repair the database, run Isinteg -fix, and ExMerge the results to a blank database.
  • Resolution 3 – Repair the public information store. Remove all the transaction logs. Run Isinteg -fix against the private store and then against the public store. ExMerge the results of the private store to a new blank private store. Save all public folders to .pst files and then bring the information back from .pst files to a new blank public store or request Pubmerge from Microsoft Product Support Services.

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