RMAN recover時 資料庫居然跟我要 兩天前的archive log

最近在還原資料庫時居然發生此問題
百思不得其解
正常的RMAN recover 只會需要 Backup window期間所有的archive log 才對

直到看到這篇文章提到了...
RMAN was requesting archived logs that were generated almost a week back

某位路人說 The controlfile is may be older and datafiles are newer

是跟我類似的情境耶, 忽然恍然大悟...

原來rman script 中的channel 1 是做bkset 備份 , 做八個小時.
                                  channel 2 是做bkset , archive log 備份, 而channel 2 做了將近三天
如此則會導致還原時~ 遇到的問題一再發生...
下次如果要還原時確定一下control file的時間到底為幾號備的
  或是使用以下方法

SQL>
RECOVER DATABASE USING BACKUP CONTROLFILE UNTIL TIME 'YYYY-MM-DD:HH24:MI:SS';

以上的效果為: When Oracle starts recovery, it looks at the datafiles to know the last time a checkpoint was performed on the datafile. Oracle now knows to start applying recovery to the datafile for all SCNs after the SCN in the datafile header