| Transaction logging is a disaster recovery | | | | from being located are: |
| procedure of Microsoft Exchange Server that | | | | 1. |
| helps the database to get restored in consistent | | | | The temporary folder doesn't contain the log files. |
| state after any unexpected stop. When the | | | | The transaction logs are missing. |
| database stops suddenly, it goes to inconsistent | | | | 2. |
| state. On next restart, Exchange Server locates | | | | An antivirus software is running that has |
| and then scans the log files to apply them from | | | | quarantined the log file |
| the database file. But for any reason if it fails to | | | | 3. |
| locate those log files, the recovery attempts fail. | | | | A hardware failure that has caused log files to |
| This forces you to locate the missing log files | | | | lose. |
| manually. However, if it cannot be accomplished, | | | | Solution |
| you need to restore the database from a suitable | | | | You need to apply these measures to solve the |
| backup or perform Exchange Server Recovery | | | | existing problem: |
| using appropriate database repair procedures. | | | | 1. |
| For each event in Exchange Server, the | | | | Check if the required log files have been moved. |
| application logs the associated entry in Windows | | | | If yes, move them back to the correct folder. |
| Application log. So, you might encounter the | | | | But if they have been deleted, you need to |
| following error message displaying in this | | | | restore from the backup. |
| application log, usually after unexpected stop: | | | | 2. |
| “Database requires log files that could not be | | | | You need to stop the antivirus scanning if any and |
| located. The database requires log files to | | | | examine its registry settings to put back the |
| continue. Make sure the log files exist. Check | | | | current log files to correct folder. |
| Event logs for more information.” | | | | 3. |
| The event ID of this error in 453 and can cause | | | | If none of the above measures work, you should |
| database to become unmountable. | | | | restore the database from the backup or apply |
| Cause | | | | eseutil repair (hard recovery) utilities to repair the |
| Exchange database needs some log files that it | | | | database. |
| could not locate to continue. For further | | | | Eseutil hard recovery is not safe to use as it |
| information on which log files could not be located, | | | | deletes the corrupted pages. Thus, you are |
| you can see the event description which mentions | | | | suggested to use commercial Exchange Recovery |
| the sequence of log files that it could not locate. It | | | | utilities as a better option. The Exchange Server |
| also includes the log file number, up to which | | | | Recovery software are suitable choice to repair |
| recovery has been possible. | | | | corrupted Exchange database using safe, yet |
| Some prime reasons that might prevent log files | | | | effective, scanning algorithms. |