It's working now - thank you all - Roger SQL> alter database mount standby database; Database altered. SQL> ALTER DATABASE ACTIVATE STANDBY DATABASE; Database altered. SQL> select status from v$instance; STATUS ------------ STARTED SQL> alter database mount; Database altered. SQL> alter database open; Database altered. SQL> select status from v$instance; STATUS ------------ OPEN SQL> -----Original Message----- From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx]On Behalf Of Roger Xu Sent: Monday, October 09, 2006 2:54 PM To: Oracle-L@Freelists. Org (E-mail) Subject: 9i Physical Standby failover Hi, I am testing failover but getting ORA-1666 error. Am I missing something here? Thanks, Roger SQL> alter database recover managed standby database finish; Database altered. SQL> alter database commit to switchover to primary; alter database commit to switchover to primary * ERROR at line 1: ORA-16139: media recovery required SQL> shutdown immediate; ORA-01109: database not open Database dismounted. ORACLE instance shut down. SQL> startup ORACLE instance started. Total System Global Area 420480856 bytes Fixed Size 730968 bytes Variable Size 117440512 bytes Database Buffers 301989888 bytes Redo Buffers 319488 bytes ORA-01666: controlfile is for a standby database SQL> This e-mail is intended solely for the person or entity to which it is addressed and may contain confidential and/or privileged information. Any review, dissemination, copying, printing or other use o ____________________________________________________________________ This email has been scanned for all viruses by the MessageLabs Email Security System. This e-mail is intended solely for the person or entity to which it is addressed and may contain confidential and/or privileged information. Any review, dissemination, copying, printing or other use o ____________________________________________________________________ This email has been scanned for all viruses by the MessageLabs Email Security System.