{process name} ({process id}) The database page read from the file “{name}” at offset {value} for {value} bytes failed verification due to a page checksum mismatch. The expected checksum was {value} and the actual checksum was {value}. The read operation will fail with error {error code}. If this condition persists then please restore the database from a previous backup.

Details
Product: Exchange
Event ID: 474
Source: ESE98
Version: 6.0
Component: Extensible Store Engine
Symbolic Name: DATABASE_PAGE_CHECKSUM_MISMATCH_ID
Message: {process name} ({process id}) The database page read from the file “{name}” at offset {value} for {value} bytes failed verification due to a page checksum mismatch. The expected checksum was {value} and the actual checksum was {value}. The read operation will fail with error {error code}. If this condition persists then please restore the database from a previous backup.
   
Explanation
A database page is corrupt.
   
User Action
Restore the database from backup media.

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