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<??http://www.2cto.com/kf/ware/vc/" target="_blank" class="keylink">vc3Ryb25nPi48YnIgLz4NCkMuIFRoZSBteV9kYXRhXzAxLmRiZiBkYXRhZmlsZSBoYXMgbm90IHlldCBiZWVuIGJhY2tlZCB1cC4gVGhpcyByZXBvcnQgaW1wbGllcyB0aGF0IHRoZSBkYXRhIGluIHRoZTxiciAvPg0KZGF0YWZpbGUgY2FuIG5vdCBiZSByZWNvdmVyZWQuPGJyIC8+DQpELiBUaGUgbXlfZGF0YV8wMS5kYmYgZGF0YWZpbGUgbm8gbG9uZ2VyIG1lZXRzIHRoZSByZXRlbnRpb24gY3JpdGVyaWEgZm9yIGJhY2t1cHMuPGJyIC8+DQpFLiBEYXRhZmlsZSA1IGlzIG1pc3NpbmcuPGJyIC8+DQpDb3JyZWN0IEFuc3dlcjogQjwvcD4NCjxociAvPg0KPGgyIGlkPQ=="这个报告的输出是什么">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。