1> 检查数据库，查看控制文件存放路径
 SQL> startup
 Oracle instance started.
 
Total System Global Area  230686720 bytes
 Fixed Size      1218676 bytes
 Variable Size    71305100 bytes
 Database Buffers  155189248 bytes
 Redo Buffers      2973696 bytes
 Database mounted.
 Database opened.
 SQL> show parameter control;
 
NAME        TYPE  VALUE
 ------------------------------------ ----------- ------------------------------
 control_file_record_keep_time      integer  7
 control_files        string  +DATA/oradb/controlfile/backup
        .259.762002877                  //控制文件名
 
SQL> shutdown immediate;                    //关闭数据库
 Database closed.
 Database dismounted.
 ORACLE instance shut down.
 SQL> startup nomount;                      //打开数据库至nomount状态
 ORACLE instance started.
 
Total System Global Area  230686720 bytes
 Fixed Size      1218676 bytes
 Variable Size    71305100 bytes
 Database Buffers  155189248 bytes
 Redo Buffers      2973696 bytes
 SQL>
SQL> exit 
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
 With the Partitioning, OLAP and Data Mining options
 [oracle@node1 ~]$ rman target /                    //进入RMAN
 
Recovery Manager: Release 10.2.0.1.0 - Production on Fri Sep 16 16:36:09 2011
 Copyright (c) 1982, 2005, Oracle.  All rights reserved.
 connected to target database: oradb (not mounted)
 RMAN> restore controlfile to '+data/oradb/controlfile/backup.259.762002875' from '+data/oradb/controlfile/backup.259.762002877'; //利用数据库当前的控制文件，创建一个新的控制文件
 
Starting restore at 16-SEP-11
 using target database control file instead of recovery catalog
 allocated channel: ORA_DISK_1
 channel ORA_DISK_1: sid=156 devtype=DISK
 channel ORA_DISK_1: copied control file copy
 Finished restore at 16-SEP-11
 Recovery Manager complete.
 RMAN> exit
 [oracle@node1 ~]$ export ORACLE_SID=+ASM
 [oracle@node1 ~]$ asmcmd                              //进入ASM实例命令
 ASMCMD> +data/oradb/controlfile
 ASMCMD> ls -ltr                                          //查看新创建的控制文件名
 Type        Redund  Striped  Time            Sys  Name
 CONTROLFILE  HIGH    FINE    SEP 16 16:00:00  Y    backup.259.762002877
 CONTROLFILE  HIGH    FINE    SEP 16 16:00:00  Y    backup.265.762021421
 ASMCMD> exit
 
[oracle@node1 ~]$ export ORACLE_SID=oradb
 [oracle@node1 ~]$ sqlplus / as sysdba                //进入数据库
 
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Sep 16 16:38:30 2011
 Copyright (c) 1982, 2005, Oracle.  All rights reserved.
 Connected to:
 Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
 With the Partitioning, OLAP and Data Mining options
 
SQL> create pfile='/u01/oracle/product/10g/dbs/oradb.ora' from spfile;  //创建数据库的pfile 参数文件
 File created.
 
SQL> shutdown immediate;                                                //关闭数据库
 ORA-01507: database not mounted
 ORACLE instance shut down.
 SQL> exit