rman 恢複資料錯誤案例--ORA-19573 錯誤

系統內容：
作業系統： AIX 5300-08
Oracle：  Oracle 10.2.0.1.0

錯誤現象：

RMAN> restore datafile 4;
Starting restore at 20-MAY-14
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=139 devtype=DISK
channel ORA_DISK_1: starting datafile backupset restore
channel ORA_DISK_1: specifying datafile(s) to restore from backup set
restoring datafile 00004 to /u01/app/oracle/oradata/prod/users01.dbf
channel ORA_DISK_1: reading from backup piece /backup/inc0_PROD_2qp8omr6_1_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 05/20/2014 12:19:41
ORA-19870: error reading backup piece /backup/inc0_PROD_2qp8omr6_1_1
ORA-19573: cannot obtain exclusive enqueue for datafile 4

一直以為是備份有問題，沒有找到備份的資料檔案！

原來是DataBase 在open下，忘了將datafile offline，造成此低級錯誤；將資料檔案offline 後，問題解決！

--------------------------------------分割線 --------------------------------------

推薦閱讀：

RMAN 配置歸檔日誌刪除策略

Oracle基礎教程之通過RMAN複製資料庫

RMAN備份策略制定參考內容

RMAN備份學習筆記

OracleDatabase Backup加密 RMAN加密

--------------------------------------分割線 --------------------------------------