ORA-12638 ORA-01031 Connecting As Sysdba After Configuring RMAN Backup on Shared Drives

(Doc ID 452446.1)

Last updated on DECEMBER 06, 2016

Applies to:

Oracle Database - Enterprise Edition - Version to [Release 9.2 to 10.2]
z*OBSOLETE: Microsoft Windows
***Checked for relevance on 19-Nov-2010***
Microsoft Windows


Following the steps mentioned in  <Note 145843.1> and  restarting the database  we are getting ORA-12638  at startup.

To solve this we need to change the SQLNET.ORA parameter SQLNET.AUTHENTICATION_SERVICE from NTS to NONE which allow you to start the Database.Unfortunately, now we cannot connect to the database  using "/ as sysdba" and getting ORA-01031.



Changes are made according to <Note 145843.1> "How to configure RMAN to write to share drives onWindows NT/2000"


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