If _datafile_write_errors_crash_instance = TRUE (default in 11gR2 & after) then any write to a datafile which fails due to an IO error causes an instance crash.
If _datafile_write_errors_crash_instance = FALSE(default before 11gR2) then the behaviour reverts to the previous behaviour (before this fix) such that a write error to a datafile offlines the file if the DB is in archivelog mode and the file is not in system tablespace. If DB in noarchivelog mode , instance will be still aborted.
If _datafile_write_errors_crash_instance = FALSE(default before 11gR2) then the behaviour reverts to the previous behaviour (before this fix) such that a write error to a datafile offlines the file if the DB is in archivelog mode and the file is not in system tablespace. If DB in noarchivelog mode , instance will be still aborted.
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