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startup nomount You have lost the UNDO tablespace, so switch to manual undo management: alter system set undo_management=manual scope=spfile sid='*'; You have lost the redo logs and your remaining datafiles are in an inconsistent state, so you will not be able to open the instance, unless you allow resetlogs corruption: alter system set ...


These are the default values related to this: NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ os_authent_prefix string ops$ remote_os_authent boolean FALSE Set remote_os_authent to true: alter system set ...

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