|Message:||%1 (%2) %3The log range read from the file “%4” at offset %5 for %6 bytes failed verification due to a range checksum mismatch. The expected checksum was %8 and the actual checksum was %9. The read operation will fail with error %7. If this condition persists then please restore the logfile from a previous backup.|
This Warning event indicates that a checksum in a transaction log file failed verification. This error is similar to error -1018 in a database file, and indicates the log file has been damaged in the file system.
This issue can occur if the log file mentioned in the event has become corrupted. Exchange cannot repair damage to log files because of factors other than torn writes, which will be fixed automatically by the ESE. Hardware failures that randomly damage a log file cannot be overcome because the data cannot be reliably reconstructed. ESE event 477 indicates damage that cannot be repaired. The following are the most common error codes associated with this event:
For information about ESE error codes other than the ones explained in this topic, see the following Microsoft Knowledge Base articles:
This warning may indicate that the log file cannot be repaired.
To resolve this warning, do one or more of the following: