The redo log records all changes made in datafiles. When you run your database in NOARCHIVELOG mode, you disable the archiving of the redo log.
By default, the No Redo Log is disabled. Hence, While restoring the database, RMAN will search for archived redo logs after applying incremental backup data. Setting No Redo Logs will enable the RMAN to suppress the archived redo logs so that only data from incremental backups is restored. Enable No Redo logs when you perform a point-in-time restore of a database that was backed up in NOARCHIVELOG mode.
Procedure
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From the CommCell Browser, expand Client Computers > client.
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Right-click the instance, point to All Tasks and then click Browse and Restore.
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Select Latest Backup and click View Content.
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Select the databases and click Recover All Selected.
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Select the option for the type of restore operation, and then click Next.
An Oracle restore options dialog box appears.
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On the General tab, click Advanced.
The Advanced Restore Options dialog box is displayed.
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On the Options tab, select the No Redo Logs check box.
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Click OK.
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Click OK.