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Datafile (system ) corrupted on physical standby database

Hi, I need some expert advice please:


Our environment: RAC-RAC dataguard, DB: Oracle 11gR2, ASM, SAN storage, OS: RHEL5

                               DR site have physical standby database.


Problem: We had a power failure on our DR site. As a result SAN and DB server were down illegally. After we fixed power and hardware, I was trying to open database in read only mode to check. Until database mount state it works well. But when I am trying to open, I am having the following error


alter database open

*

ERROR at line 1:

ORA-10458: standby database requires recovery

ORA-01196: file 1 is inconsistent due to a failed media recovery session

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