The database server alerts the user and administrator
to possible corruption in the following ways:
Error messages reported to the application state that pages, tables, or
databases cannot be found. One of the following errors is always returned
to the application if an operation has failed because of an inconsistency
in the underlying data or overhead information:
-105 ISAM error: bad isam file format
-172 ISAM error: Unexpected internal error
Assertion-failure reports are written to the database server message
log. They always indicate files that contain additional diagnostic information
that can help you determine the source of the problem. See Verifying Consistency.