trace文件：
Errors in file /crbank/dbs/app/product/diag/rdbms/rdbs/dbs/trace/dbs_mrp0_24445130.trc:
ORA-00313: open failed for members of log group 8 of thread 1
ORA-00312: online log 8 thread 1: '/crbank/dbs/data/oradata/dbs/redo08.log'
ORA-27037: unable to obtain file status
IBM AIX RISC System/6000 Error: 2: No such file or directory
从trace文件可以看到备库跟主库路径不一样，备库设置了convert参数，这个参数对以后的文件传输路径有效，但是对于已存在的文件就需要手动修改了，包括数据文件，日志文件，临时文件等。
下面介绍 备库redolog重建步骤：
SQL> alter system set standby_file_management=manual;
System altered.
SQL> alter database recover managed standby database cancel;
Database altered.
SQL> alter database drop logfile group 8;
alter database drop logfile group 8
*
ERROR at line 1:
ORA-01156: recovery or flashback in progress may need access to files
SQL> select group#,status,bytes/1024/1024 from v$log;
GROUP# STATUS BYTES/1024/1024
---------- ---------------- ---------------
1 UNUSED 256
2 UNUSED 256
3 UNUSED 256
8 CURRENT 256
5 UNUSED 256
6 UNUSED 256
4 UNUSED 256
SQL> alter database clear unarchived logfile '/crbank/dbs/data/oradata/dbs/redolog07.log';
alter database clear unarchived logfile '/crbank/dbs/data/oradata/dbs/redolog07.log'
*
ERROR at line 1:
ORA-01156: recovery or flashback in progress may need access to files
redolog 8 是当前正在使用的日志 所以不能直接删除，由于是备库 也不能切换日志，所以可以修改日志路径：
SQL> alter database rename file '/crbank/dbs/oradata/dbs/redo12.log' to '/crbank/dbs/data/oradata/dbs/redolog12.log'; --跟换路径
SQL> alter database add logfile group 1 '/crbank/dbs/data/oradata/dbs/redolog01.log' size 256m; --新增另外一组日志
Database altered.
alter system set standby_file_management=auto;
alter database recover managed standby database using current logfile disconnect;
select process,status,thread#,sequence#,block#,blocks from v$managed_standby where process!='ARCH';