ocp-v13-347

QUESTION 347
What does the output on this report indicate?
RMAN> report need backup;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
Report of files with less than 1 redundant backups
File #bkps Name
5 0 C:\ORACLE\ORADATA\ORCL\MY_DATA_01.DBF
A. The my_data_01.dbf datafile is corrupted and needs to be restored.
B. The my_data_01.dbf datafile has not yet been backed up. This report does not imply that the data in the datafile can not be recovered.
C. The my_data_01.dbf datafile has not yet been backed up. This report implies that the data in the
datafile can not be recovered.
D. The my_data_01.dbf datafile no longer meets the retention criteria for backups.
E. Datafile 5 is missing.
Correct Answer: B

这个报告的输出是什么?

RMAN> report need backup;
RMAN retention policy will be applied to the command
RMAN retention policy is set to redundancy 1
Report of files with less than 1 redundant backups
File #bkps Name
5 0 C:\ORACLE\ORADATA\ORCL\MY_DATA_01.DBF
B. my_data_01.dbf数据文件没有备份。本报告并不意味着数据在数据文件无法恢复。

因为只是没有备份，不代表不能recover，有可能用archived logs 能恢复的