process name (process id) file nameThe patch page read from the file “value” at offset value for error code bytes failed verification due to a page checksum mismatch. The expected checksum was value and the actual checksum was %9. The read operation will fail with error value. If this condition persists then please restore using an earlier backup set.

Details
Product: Exchange
Event ID: 479
Source: ESE
Version: 6.5.0000.0
Message: process name (process id) file nameThe patch page read from the file “value” at offset value for error code bytes failed verification due to a page checksum mismatch. The expected checksum was value and the actual checksum was %9. The read operation will fail with error value. If this condition persists then please restore using an earlier backup set.
   
Explanation
The patch file specified in the message is corrupt. This may have occurred during backup or restore, and may be due to a hardware problem.
   
User Action
Review the event log for hardware-related messages. After the hardware problem is resolved, perform backup or restore again.

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