053-324

Your database is up and running and one of your three control files is accidentally erased. You start RMAN and run the following command:
RESTORE CONTROLFILE FROM AUTOBACKUP;
Which of the following statements is true? (Choose all that apply.)
A. The command restores only the missing control file.
B. The command restores all the control files.
C. The command fails because the database is running.
D. This is the correct way to address this problem.
E. This is not the correct way to address this problem.

　　This is not the correct way to approach the loss of one of serveral controls files.The better way to approch this loss is to shut down the database and simply copy one of the surving control files over to where the missing control file existed.

注:恢复控制文件在要在 nomount 状态下恢复的，所以说这个不是一个正确的解决方法。