| Event Id | 477 |
| Source | ESE |
| Description | Information Store (1556) The log range read from the file "D:\Program Files\exchsrvr\mdbdata\First Storage Group\E0000001.log" at offset 2736128 (0x000000000029c000) for 3072 (0x00000c00) bytes failed verification due to a range checksum mismatch. The read operation will fail with error -612 (0xfffffd9c). |
| Event Information | According to Microsoft : CAUSE These issues occur because of a defective hard disk subsystem hardware component or because of outdated or incompatible drivers or firmware in the hard disk subsystem. • The -612 (Jet_errLogReadVerifyFailure) error occurs when a checksum error occurs in a log file during backup. • 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 The problem in the disk subsystem may be caused by defective disk drives, by outdated or incompatible disk drive firmware, or by outdated or incompatible controller firmware.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: • Incorrect data is written to the storage media. • Data is written to an incorrect location on the storage media. • Data is damaged or changed after the data is written to the storage media. |
| Reference Links | Extensible Storage Engine Event IDs 474 Are Logged When You Try to Back Up the Information Store Database. |
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