[oracle@jumper dbs]$ rman target /

www.ixdba.net

Recovery Manager: Release 9.2.0.4.0 - Production

Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.

connected to target database (not started)

RMAN> startup nomount;

startup failed: ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/opt/oracle/product/9.2.0/dbs/initconner.ora'

trying to start the Oracle instance without parameter files ...
Oracle instance started

Total System Global Area 97588504 bytes

Fixed Size 451864 bytes
Variable Size 46137344 bytes
Database Buffers 50331648 bytes
Redo Buffers 667648 bytes

SQL> show parameter db_name

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
db_name string DUMMY

[oracle@jumper log]$ rman target /

Recovery Manager: Release 9.2.0.4.0 - Production

Copyright (c) 1995, 2002, Oracle Corporation. All rights reserved.

connected to target database: DUMMY (not mounted)

RMAN> restore spfile to '/tmp/spfile.ora' from 'c-3152029224-20060509-00';

Starting restore at 09-MAY-06

using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=9 devtype=DISK
channel ORA_DISK_1: autobackup found: c-3152029224-20060509-00
channel ORA_DISK_1: SPFILE restore from autobackup complete
Finished restore at 09-MAY-06

RMAN>

恢复完成以后，关闭数据库，然后重新启动数据库。这样数据库的参数文件就用自动备份的恢复了。