Unable to sqlplus as user system to a standby db in recovery mode

Question

Getting "ORA-01033: ORACLE initialization or shutdown in progress".
When trying to sqlplus system user on a standby instance that is in recovery mode.
Where as able to log in as sqlplus "/ as sysdba"
I checked the db it is not shuting down or starting it is in recovery mode.. no errors in alert log..
1) --------------------
$ sqlplus system@TEST1
SQL*Plus: Release 9.2.0.6.0 - Production on Sun Feb 26 04:47:35 2006
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Enter password:
ERROR:
ORA-01033: ORACLE initialization or shutdown in progress
$ ps -ef | grep mrp
oracle 26759 1 0 04:24:19 ? 0:00 ora_mrp0_TEST1
2) -------------
$ sqlplus "/ as sysdba"
SQL*Plus: Release 9.2.0.6.0 - Production on Sun Feb 26 04:50:14 2006
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
3)--------
$ sqlplus "/ as sysdba"
SQL*Plus: Release 9.2.0.6.0 - Production on Sun Feb 26 04:50:14 2006
Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
4)----------
SQL> select process, status from v$managed_standby;
PROCESS STATUS
ARCH CONNECTED
ARCH CONNECTED
MRP0 WAIT_FOR_LOG
RFS RECEIVING

Answer 1

A standby database in recovery mode is only accessible as sysdba for administrative purposes. You have to open the DB in read only mode to access it as "normal" user.
See http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96653/manage_ps.htm#1014483