备库无法打开：
SQL> alter database open;
alter database open
*
ERROR at line 1:
ORA-10458: standby database requires recovery
ORA-01152: file 1 was not restored from a sufficiently old backup
ORA-01110: data file 1: '+DATA/phub/datafile/system.258.884216521'

日志报错：
Standby Crash Recovery aborted due to error 16016.
Errors in file /u01/app/oracle/admin/PHUB/diag/rdbms/phub/PHUB/trace/PHUB_ora_5643.trc:
ORA-16016: archived log for thread 1 sequence# 16 unavailable

Wait timeout: thread 2 sequence 14
Standby Crash Recovery aborted due to error 16016.
Errors in file /u01/app/oracle/admin/PHUB/diag/rdbms/phub/PHUB/trace/PHUB_ora_5971.trc:
ORA-16016: archived log for thread 2 sequence# 14 unavailable

从主库上把这两个日志拷贝到备库：
然后注册；

SQL> alter database register physical logfile '/home/oracle/thread_1_seq_16.365.883970323';

Database altered.

SQL> alter database register physical logfile '/home/oracle/thread_2_seq_14.363.884216233';

Database altered.

再open 数据库；
SQL> alter database open;

Database altered.
后台日志：
Beginning Standby Crash Recovery.
Serial Media Recovery started
Managed Standby Recovery starting Real Time Apply
Sun Jul 05 00:33:32 2015
Media Recovery Log /home/oracle/thread_1_seq_16.365.883970323
Media Recovery Log /home/oracle/thread_2_seq_14.363.884216233
Incomplete Recovery applied until change 43399676704 time 07/02/2015 03:17:58
Completed Standby Crash Recovery.
Sun Jul 05 00:33:34 2015
SMON: enabling cache recovery
Dictionary check beginning