Error while Backup

Question

Hi Experts,
When i try to take backup via. i'm getting this error :( . Pls Help
C:\oracle\product\10.2.0\db_3\BIN>rman target /
Recovery Manager: Release 10.2.0.1.0 - Production on Fri Nov 9 22:30:33 2012
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
connected to target database: TEST (DBID=2095219496)
RMAN> backup database;
Starting backup at 09-NOV-12
using target database control file instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=141 devtype=DISK
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 11/09/2012 22:32:
18
ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
continuing other job steps, job failed will not be re-run
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
including current control file in backupset
including current SPFILE in backupset
channel ORA_DISK_1: starting piece 1 at 09-NOV-12
channel ORA_DISK_1: finished piece 1 at 09-NOV-12
piece handle=C:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\TEST\BACKUPSET\2012_11
_09\O1_MF_NCSNF_TAG20121109T223217_89TFRXYP_.BKP tag=TAG20121109T223217 comment=
NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:00:06
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 11/09/2012 22:32:
18
ORA-19602: cannot backup or copy active file in NOARCHIVELOG mode
RMAN>i'm not dba.i'm just learning dba using my home system

Answer 1

Hello,
Your database is running in NOARCHIVE mode. You have two options here:
1. Either place your database in archive log mode and then take the backup.
SQL>alter system set log_archive_dest_1='location=<location where you want the database to generate the archives>';
SQL>shut immediate
SQL>startup mount
SQL>alter database archivelog;
SQL>alter database open;Now take the backup of the database through RMAN.
2. If you do not want to have your database in archivelog mode, then take the backup of the database through RMAN when the database is in mount mode.
SQL>shut immediate
SQL>startup mountNow take the backup of the database through RMAN and once done, open the database.
It is recommended to take the backup by placing the database in archivelog mode.