1、启动出错
SQL> startup
ORACLE instance started.

Total System Global Area 3774873600 bytes
Fixed Size                  2025400 bytes
Variable Size             570427464 bytes
Database Buffers         3187671040 bytes
Redo Buffers               14749696 bytes
ORA-00205: error in identifying control file, check alert log for more info

2、alert_SID.log

Mon Aug 10 09:57:19 2009
starting up 1 dispatcher(s) for network address '(ADDRESS=(PARTIAL=YES)(PROTOCOL=TCP))'...
MMNL started with pid=12, OS id=1015820
Mon Aug 10 09:57:19 2009
starting up 1 shared server(s) ...
Mon Aug 10 09:57:19 2009
ALTER DATABASE   MOUNT
Mon Aug 10 09:57:22 2009
ORA-00202: control file: '/oracle/oradata/undo/cntrl/control03.ctl'
ORA-27037: unable to obtain file status
IBM AIX RISC System/6000 Error: 2: No such file or directory
Additional information: 3
Mon Aug 10 09:57:22 2009
ORA-205 signalled during: ALTER DATABASE   MOUNT...

原来oracle的数据文件放在HP的EVA存储中，HP存储没有挂载到系统中，把AIX系统的中后台存储挂载到系统中再启动则行。