rman 恢复数据错误案例
系统环境:
操作系统: AIX 5300-08
Oracle: Oracle 10.2.0.1.0
错误现象:
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
一直以为是备份有问题,没有找到备份的数据文件!
原来是DataBase 在open下,忘了将datafile offline,造成此低级错误;将数据文件offline 后,问题解决!