1.Connect to target Database with RMAN.
i)If you have lost your spfile while your database is running then,
RMAN>CONNECT TARGET /
ii)If your database is not up and you don't use recovery catalog then use,
RMAN>CONNECT TARGET /
RMAN>SET DBID 3386862614
2)Start the instance with dummy parameter file.
RMAN>STARTUP FORCE NOMOUNT
3)Restore server parameter file.
To restore in default location,
RMAN> RESTORE SPFILE FROM AUTOBACKUP;
To restore in another location,
RMAN> RESTORE SPFILE TO 'new_location' FROM AUTOBACKUP;
If you want to restore to a pfile then use,
RMAN> RESTORE SPFILE TO PFILE '/tmp/initTEMP.ora';
4)Start the instance.
RMAN>STARTUP;
Related Documents:
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How Spfile can be Recovered
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