%1 (%2) %3Corruption was detected during hard recovery in logfile %4. The failing checksum record is located at position %5. Data not matching the log-file fill pattern first appeared in sector %6. This logfile has been damaged and is unusable.

Details
Product:	Exchange
Event ID:	464
Source:	ESE
Version:	8.0
Symbolic Name:	LOG_CORRUPTION_DURING_HARD_RECOVERY_ID
Message:	%1 (%2) %3Corruption was detected during hard recovery in logfile %4. The failing checksum record is located at position %5. Data not matching the log-file fill pattern first appeared in sector %6. This logfile has been damaged and is unusable.

Explanation
This Error event indicates that corruption was detected in the log file during hard recovery. This log file is damaged and unusable. Hard recovery is the process that changes a restored database back to a consistent state by playing transactions into the database from transaction log files. To initiate hard recovery, you select the Last Backup Set check box in Backup when you restore your last database, or you can use the eseutil /cc command.

User Action
To resolve this error, do one or more of the following: Restore the log file from a backup copy. Use the Exchange Server Database Utilities (Eseutil.exe) tool with the /R and /A switches to recover a database with missing log files. For more information, see Eseutil /R Recovery Mode. If you are having difficulty resolving the issue, contact Microsoft Product Support. For information about contacting support, visit the Contact Us page of the Microsoft Help and Support Web site.