Oracle hidden corruption recovery parameters

Note: Oracle hidden parameters are undocumented and unsupported by Oracle. 
Make sure that you thoroughly test all hidden parameters before placing them in your production environment.

Parameter Name                            Description

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_allow_error_simulation                   Allow error simulation for testing

_allow_read_only_corruption               allow read-only open even if database is corrupt

_allow_resetlogs_corruption               allow resetlogs even if it will cause corruption

_allow_terminal_recovery_corruption       Finish terminal recovery even if it may cause corruption

_corrupted_rollback_segments              corrupted undo segment list