Error when trying to recover datafile from standby database to primary

Question

hi friends,
getting problem with restoring datafile from backupset taken on standby database to primary database.
os: windows server 2003
db: oracle 11gR1(11.1.0.6)
i've configured standby database on two different hosts.
host1 - primary (db_uinque_name= prod)
host2 - standby (db_uniue_name= prodsby)
I've configure both database with recovery catalog. I take backup on standby database. users' datafile of primary database has been lost.i'm trying to restore from the backupsets taken on standby database.
with the help of - http://download.oracle.com/docs/cd/B28359_01/server.111/b28294/rman.htm#BAJCEFEG
on primary
c:\>rman target sys/password catalog rcat/password
rman>list backup for db_unique_name prodsby;
display the backupsets
rman>restore datafile 4;
Starting restore at 06-NOV-08
starting full resync of recovery catalog
full resync complete
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1051 device type=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 11/06/2008 12:12:18
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 4 found to restore
also use to tag to restore the datafile
rman>restore datafile 4 from tag='base0_prodsby';
Starting restore at 06-NOV-08
using channel ORA_DISK_1
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 11/06/2008 11:27:21
RMAN-06026: some targets not found - aborting restore
RMAN-06023: no backup or copy of datafile 4 found to restore
i'm getting above errors when try to restore the datafile.
when i issue the following command.
BACKUP AS COPY DATAFILE 4 AUXILIARY FORMAT 'C:\app\Administrator\oradata\prod\USERS01.DBF';
Starting backup at 06-NOV-08
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1068 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=C:\APP\ADMINISTRATOR\ORADATA\prod\USERS01.
DBF
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 11/06/2008 12:49:
15
ORA-17628: Oracle error 19505 returned by remote Oracle server
please friends, try to help me to solve the problem.
Thanks,
Vihang

Answer 1

hi.
Its not necessary its a otherway around to recover datafile from this backupset and apply archivelogs to make datafile consistent.
yes, it ain't the right way to restore backup to primary location.
so how would i connect to standby database with primary and recovery catalog.
i need to connect to recovery catalog and primary site because i need to restore to primary location and recovery catalog contain all metadata and backupsets related information.
i also tried the following steps from oracle documentation.
Connect to the standby database as the target database:
CONNECT TARGET sys@standby
You are prompted for a password:
target database Password: password
Connect to the primary database as the auxiliary database:
CONNECT AUXILIARY sys@primary
You are prompted for a password:
target database Password: password
Back up the datafile on the standby host across the network to a location on the primary host. For example, suppose that /disk1/df2.dbf is the name of datafile 2 on the standby host. Suppose that /disk8/datafile2.dbf is the name of datafile 2 on the primary host. The following command would copy datafile 2 over the network to /disk9/df2copy.dbf:
BACKUP AS COPY DATAFILE 2 AUXILIARY FORMAT '/disk9/df2copy.dbf';
Starting backup at 06-NOV-08
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: SID=1068 device type=DISK
channel ORA_DISK_1: starting datafile copy
input datafile file number=00004 name=C:\APP\ADMINISTRATOR\ORADATA\prod\USERS01.
DBF
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 11/06/2008 12:49:
15
ORA-17628: Oracle error 19505 returned by remote Oracle server
getting this error.