1.

You Have Taken A Manual Backup Of A Datafile Using O/s. How Rman Will Know About It? Or How To Put Manual/user-managed Backup In Rman (recovery Catalog)?

Answer»

By using catalog COMMAND.You have to catalog that manual backup in RMAN’s repository by command 
RMAN> catalog datafilecopy ‘/DB01/BACKUP/users01.dbf’;
or
RMAN> CATALOG START WITH ‘/tmp/backup.ctl’;
Restrictions:
> ACCESSIBLE on DISK
> A COMPLETE image copy of a single file

By using catalog command.You have to catalog that manual backup in RMAN’s repository by command 
RMAN> catalog datafilecopy ‘/DB01/BACKUP/users01.dbf’;
or
RMAN> CATALOG START WITH ‘/tmp/backup.ctl’;
Restrictions:
> Accessible on disk
> A complete image copy of a single file



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