%1 (%2) %3The patch page read from the file “%4” at offset %5 for %6 bytes failed verification due to a page 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 using an earlier backup set.

Details
Product: Exchange
Event ID: 479
Source: ESE
Version: 8.0
Symbolic Name: PATCH_PAGE_CHECKSUM_MISMATCH_ID
Message: %1 (%2) %3The patch page read from the file “%4” at offset %5 for %6 bytes failed verification due to a page 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 using an earlier backup set.
   
Explanation

This Warning event indicates that the patch file specified in the message is corrupted. This may have occurred during backup or restore, and may be due to a hardware problem.

   
User Action

To resolve this warning, review the Application log and System log for hardware-related messages. After the hardware problem is resolved, perform backup or restore again.

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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