| Event Id | 474 |
| Source | ESENT |
| Description | <Process><ID>The database page read from the file<File Path>at offset<Offset>for<Value>bytes failed verification due to a page checksum mismatch. The expected checksum was<Checksum> and the actual checksum was<Checksum>. The read operation will fail with error<Error>. If this condition persists then please restore the database from a previous backup. |
| Event Information | This information from some newsgroups may help you: ------------------------------------------------------------------------------ These issues occur because of a defective hard disk subsystem hardware component or because of outdated or incompatible drivers or firmware in the hard disk subsystem. 1. The -612 (Jet_errLogReadVerifyFailure) error occurs when a checksum error occurs in a log file during backup. 2. The -1018 (JET_errReadVerifyFailure) error occurs when a checksum error occurs on a database page. The -1018 (JET_errReadVerifyFailure) error is more frequently seen and indicates that an Exchange database has suffered damage at the file system level. This error is caused by a problem in the disk subsystem. The problem in the disk subsystem may be caused by defective disk drives, by outdated or incompatible disk drive firmware, or by outdated or incompatible controller firmware. Sometimes, too much heat around the disk drive subsystem components may cause this error. Damage may occur to the Exchange database in the following three ways: a. Incorrect data is written to the storage media. c. Data is written to an incorrect location on the storage media. c. Data is damaged or changed after the data is written to the storage media. |
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