RMAN-06100: no channel to restore a backup or copy of datafile 681
一：版本信息
操作系统版本 AIX 6109
数据库版本 11.2.0.3(PSU11)
二：错误描述
一次恢复演练中，在restore数据文件的时候报如下错误：
released channel: ch00 released channel: ch01 released channel: ch02 released channel: ch03 released channel: ch04 released channel: ch05 RMAN-00571: =========================================================== RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS =============== RMAN-00571: =========================================================== RMAN-03002: failure of restore command at 04/27/2015 10:50:35 RMAN-06026: some targets not found - aborting restore RMAN-06100: no channel to restore a backup or copy of datafile 682 RMAN-06100: no channel to restore a backup or copy of datafile 681恢复脚本如下：
run {
sql 'alter session set nls_date_format="yyyy-mm-dd hh24:mi:ss"';
set until time '2015-04-8 03:53:22';
ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE' parms='ENV=(NB_ORA_SERV=*****,NB_ORA_CLIENT=*****)';
ALLOCATE CHANNEL ch01 TYPE 'SBT_TAPE' parms='ENV=(NB_ORA_SERV=*****,NB_ORA_CLIENT=*****)';
ALLOCATE CHANNEL ch02 TYPE 'SBT_TAPE' parms='ENV=(NB_ORA_SERV=*****,NB_ORA_CLIENT=*****)';
ALLOCATE CHANNEL ch03 TYPE 'SBT_TAPE' parms='ENV=(NB_ORA_SERV=*****,NB_ORA_CLIENT=*****)';
ALLOCATE CHANNEL ch04 TYPE 'SBT_TAPE' parms='ENV=(NB_ORA_SERV=*****,NB_ORA_CLIENT=*****)';
ALLOCATE CHANNEL ch05 TYPE 'SBT_TAPE' parms='ENV=(NB_ORA_SERV=*****,NB_ORA_CLIENT=*****)';
restore tablespace SYSTEM,SYSAUX,UNDOTBS2,UNDOTBS1,USERS;
release channel ch00;
release channel ch01;
release channel ch02;
release channel ch03;
release channel ch04;
release channel ch05;
}
三 ：问题原因
后来发现是因为我用的是新的控制文件，上次全备过后数据库添加过数据文件(681,682)，在restore时，oracle根据控制文件中记录的数据文件信息来还原相应数据文件。最新的控制文件中记录有681，和682两个数据文件，但是备份集中却没有，所以restore时报错。
四：解决方案
重新restore一个离全备时间比较近的控制文件(比数据文件备份集旧的控制文件也可以)，然后mount数据库再次进行restore操作
##相关信息
RMAN RESTORE fails with RMAN-06023 or ORA-19505 or RMAN-06100 inspite of proper backups (Doc ID 457769.1)