在oracle 10.2.0.1中使用duplicate 创建standby的时候，遇到如下错误：
RMAN> duplicate target database for standby;
sql statement: alter database mount standby database
released channel: ORA_AUX_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of Duplicate Db command at 08/24/2011 10:38:31
RMAN-05501: aborting duplication of target database
RMAN-05001: auxiliary filename /opt/oracle/oradata/orcl/example01.dbf conflicts with a file used by the target database
RMAN-05001: auxiliary filename /opt/oracle/oradata/orcl/users01.dbf conflicts with a file used by the target database
RMAN-05001: auxiliary filename /opt/oracle/oradata/orcl/sysaux01.dbf conflicts with a file used by the target database
RMAN-05001: auxiliary filename /opt/oracle/oradata/orcl/undotbs01.dbf conflicts with a file used by the target database
RMAN-05001: auxiliary filename /opt/oracle/oradata/orcl/system01.dbf conflicts with a file used by the target database
如果在RMAN恢复时不指定 nofilenamecheck 参数，则在数据文件相同文件名恢复时会出现RMAN-05501错误，当主库，备库的数据库文件目录是一样的时候，必须使用 nofilenamecheck参数告诉rman主库和被创建的备份库拥有一样的文件目录和文件名。
RMAN> duplicate target database for standby nofilenamecheck;
Starting Duplicate Db at 24-AUG-11
using target database control file instead of recovery catalog
allocated channel: ORA_AUX_DISK_1
channel ORA_AUX_DISK_1: sid=34 devtype=DISK
contents of Memory Script.:
{
restore clone standby controlfile;
sql clone 'alter database mount standby database';
}
executing Memory Script
Starting restore at 24-AUG-11
using channel ORA_AUX_DISK_1
failover to previous backup
channel ORA_AUX_DISK_1: starting datafile backupset restore
channel ORA_AUX_DISK_1: restoring control file
channel ORA_AUX_DISK_1: reading from backup piece /opt/oracle/flash_recovery_area/ORCL/backupset/2011_08_23/o1_mf_ncnnf_TAG20110823T202127_7576t7qv_.bkp
channel ORA_AUX_DISK_1: restored backup piece 1
piece handle=/opt/oracle/flash_recovery_area/ORCL/backupset/2011_08_23/o1_mf_ncnnf_TAG20110823T202127_7576t7qv_.bkp tag=TAG20110823T202127
channel ORA_AUX_DISK_1: restore complete, elapsed time: 00:00:01
output filename=/opt/oracle/oradata/orcl/control01.ctl
output filename=/opt/oracle/oradata/orcl/control02.ctl
output filename=/opt/oracle/oradata/orcl/control03.ctl
Finished restore at 24-AUG-11
sql statement: alter database mount standby database
released channel: ORA_AUX_DISK_1
contents of Memory Script.:
{
set newname for tempfile 1 to
"/opt/oracle/oradata/orcl/temp01.dbf";
switch clone tempfile all;
set newname for datafile 1 to
"/opt/oracle/oradata/orcl/system01.dbf";
set newname for datafile 2 to
"/opt/oracle/oradata/orcl/undotbs01.dbf";
set newname for datafile 3 to
"/opt/oracle/oradata/orcl/sysaux01.dbf";
set newname for datafile 4 to
"/opt/oracle/oradata/orcl/users01.dbf";
set newname for datafile 5 to
"/opt/oracle/oradata/orcl/example01.dbf";
restore
check readonly
clone database
;
}