Incremental backup in noarchive log

Dear all,
Two backup script is to be written
1. for 0 level incremantal backup or full backup
2. level 1 incremantal backup
first file:
run
backup incremental level 0 database;
crosscheck backupset;
second file
run
backup incremental level 1 database;
crosscheck backupset;
Correct me please.
Also is it possible that I do it in this manner
run
backup incremental level 1 datafile 1;
backup incremental level 1 datafile 2;
and so on
thanks and regards
SL

Hi
One thing to note: In order to take incremental backups when in noarchivelog mode, you must run RMAN with the database shutdown:
http://download-uk.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup004.htm#sthref383
Cheers
B.

Similar Messages

RMAN backup in noarchived log mode

Hi,
can we take RMAN backup in noarchived log mode?
If yes, how? just run backup database command or ?
thanks

You can use RMAN to backup a database in noarchivelog mode but you need to shutdown and mount the database. e.g.:
rman target /
RMAN> shutdown immediate
RMAN> startup mount
RMAN> backup database

Is incremental backup supported using expdp in oracle 10.1.0.2

Dear All,
I heard that incremental backup is not supported in expdp of oracle 10.1.0.2.Here we have a databse which is running in noarchivelog mode.We are not allowed to shutdown the database coz it's live one.......
Our database is growing daily by 1 gb.Current expdp backup is running upto 4 hrs.Size is laready 40gb.So Is there any way where I can take incremental backup?
Please suggest me the type of backup.I have one more quetion if we can use rman backup in noarchive log mode?
Thanks,
Kris

Dear Werner,
Thnaks for your quick reply.....Here are the errors when I try to do Rman backup in noarchivelog mode.......
RMAN> backup database;
Starting backup at 17-AUG-07
using target database controlfile instead of recovery catalog
allocated channel: ORA_DISK_1
channel ORA_DISK_1: sid=139 devtype=DISK
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of backup command at 08/17/2007 13:29:38
RMAN-06056: could not access datafile 12
I have moved a datafile to different drive today .Is that anything got to do with the above error?
Thanks,
Kris

RMAN BACKUPS AND ARCHIVED LOG ISSUES

제품 : RMAN
작성날짜 : 2004-02-17
RMAN BACKUPS AND ARCHIVED LOG ISSUES
=====================================
Scenario #1:
1)RMAN이 모든 archived log들을 삭제할 때 실패하는 경우.
database는 두 개의 archive destination에 archive file을 생성한다.
다음과 같은 스크립트를 수행하여 백업후에 archived redo logfile을 삭제한다.
run {
allocate channel c1 type 'sbt_tape';
backup database;
backup archivelog all delete input;
Archived redo logfile 삭제 유무를 확인하기 위해 CROSSCHECK 수행시 다음과
같은 메시지가 발생함.
RMAN> change archivelog all crosscheck;
RMAN-03022: compiling command: change
RMAN-06158: validation succeeded for archived log
RMAN-08514: archivelog filename=
/oracle/arch/dest2/arcr_1_964.arc recid=19 stamp=368726072
2) 원인분석
이 문제는 에러가 아니다. RMAN은 여러 개의 arhive directory중 하나의
directoy안에 있는 archived file들만 삭제한다. 그래서 나머지 directory안의
archived log file들은 삭제되지 않고 남게 되는 것이다.
3) 해결책
RMAN이 강제로 모든 directory안의 archived log file들을 삭제하게 하기 위해서는
여러 개의 채널을 할당하여 각 채널이 각 archive destination안의 archived file을
백업하고 삭제하도록 해야 한다.
이것은 아래와 같이 구현될 수 있다.
run {
allocate channel t1 type 'sbt_tape';
allocate channel t2 type 'sbt_tape';
backup
archivelog like '/oracle/arch/dest1/%' channel t1 delete input
archivelog like '/oracle/arch/dest2/%' channel t2 delete input;
Scenario #2:
1)RMAN이 archived log를 찾을 수 없어 백업이 실패하는 경우.
이 시나리오에서 database를 incremental backup한다고 가정한다.
이 경우 RMAN은 recover시 archived redo log대신에 incremental backup을 사용할
수 있기 때문에 백업 후 모든 archived redo log를 삭제하기 위해 OS utility를 사용한다.
그러나 다음 번 backup시 다음과 같은 Error를 만나게 된다.
RMAN-6089: archive log NAME not found or out of sync with catalog
2) 원인분석
이 문제는 OS 명령을 사용하여 archived log를 삭제하였을 경우 발생한다. 이때 RMAN은
archived log가 삭제되었다는 것을 알지 못한다. RMAN-6089는 RMAN이 OS 명령에 의해
삭제된 archived log가 여전히 존재하다고 생각하고 백업하려고 시도하였을 때 발생하게 된다.
3) 해결책
가장 쉬운 해결책은 archived log를 백업할 때 DELETE INPUT option을 사용하는 것이다.
예를 들면
run {
allocate channel c1 type 'sbt_tape';
backup archivelog all delete input;
두 번째로 가장 쉬운 해결책은 OS utility를 사용하여 archived log를 삭제한 후에
다음과 같은 명령어를 RMAN prompt상에서 수행하는 것이다.
RMAN>allocate channel for maintenance type disk;
RMAN>change archivelog all crosscheck;
Oracle 8.0:
RMAN> change archivelog '/disk/path/archivelog_name' validate;
Oracle 8i:
RMAN> change archivelog all crosscheck ;
Oracle 9i:
RMAN> crosscheck archivelog all ;
catalog의 COMPATIBLE 파라미터가 8.1.5이하로 설정되어 있으면 RMAN은 찾을 수 없는
모든 archived log의 status를 "DELETED" 로 셋팅한다. 만약에 COMPATIBLE이 8.1.6이상으로
설정되어 있으면 RMAN은 Repository에서 record를 삭제한다.

Very strange, I issue following command in RMAN on both primary and standby machine, but it they don't delete the 1_55_758646076.dbf, I find in v$archived_log, this "/home/oracle/app/oracle/dataguard/1_55_758646076.dbf" had already been applied.
RMAN> connect target /
RMAN> CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY;
old RMAN configuration parameters:
CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY;
new RMAN configuration parameters:
CONFIGURE ARCHIVELOG DELETION POLICY TO APPLIED ON ALL STANDBY;
new RMAN configuration parameters are successfully stored
RMAN>
----------------------------------------------------------------------------------

Incremental Backup -- Archive Logs

When we take incremental backups do we need archive logs?
Here is the scenario if I delete archive log's and then take a incremental level=1 backup of the database, is my database still recoverable?

Hi,
>>If a successful incremental backup was performed AFTER the archive log was deleted, you should be OK. If the archive log was deleted after the incremental backup, you should take another incremental backup.
if the archivelog was deleted that are generated before starting the backup then u don't need that archivelog after sucessfully completion of backup and if this is generated after the backup then u loss the data.So in that case u should take another backup.
Thanks
Kuljeet

Why we cannot take hot backup if database is in noarchive log mode

Hi,
I am aware that if database is in noarchive log mode, we cannot take hot backups and only cold backup is possible.
I would like to know the technical reason behind this restriction?
Thank You
Sarayu

Hot backups are fuzzy backups, inconsistent, in other words, since something is always happening in the database. When you recover, you restore data files and then apply redo to make the transactions consistent. You can do a complete recovery or recover to a point in time. So where does the redo come from? That's what we call archiving redo logs. When the online redo gets full, it gets archived.
In the case of an instance crash, the redo is there in the online redo logs, so Oracle can recover automatically. Anything beyond that, having to do with storage media, is a media recovery, and requires those archived logs. So unless you have some other way to get your data back, always run in archivelog mode.
It is really important to understand the concepts. Please read the docs.
http://docs.oracle.com/cd/E11882_01/server.112/e25789/cncptdba.htm#CNCPT031
http://docs.oracle.com/cd/E11882_01/backup.112/e10642/rcmintro.htm#i1005488
It may be worth your while to get a third party backup and recovery book too.

Rman backup and restore noarchive log

Hi,
We are changing our backup tools from exp to rman. For this I am trying to do
restoration in test server of oracle db running on 9.2 noarchive log.
Step 1. Taken complete backup with rman with nocatalog and include controlfile
nput datafile fno=00008 name=D:\ORACLE\ORADATA\TOTO\TOOLS01.DBF
channel ORA_DISK_1: starting piece 1 at 09-MAR-06
channel ORA_DISK_1: finished piece 1 at 09-MAR-06
piece handle=D:\DBBACKUPS\T1.BKP comment=NONE
channel ORA_DISK_1: backup set complete, elapsed time: 00:01:15
Finished backup at 09-MAR-06
Step 2. Deleted database files and control files from database directory.
Step 3. Restore controlfiles
RMAN> restore controlfile from 'd:\dbbackups\t1.bkp';
Starting restore at 09-MAR-06
using channel ORA_DISK_1
channel ORA_DISK_1: restoring controlfile
channel ORA_DISK_1: restore complete
replicating controlfile
input filename=D:\ORACLE\ORADATA\TOTO\CONTROL01.CTL
output filename=D:\ORACLE\ORADATA\TOTO\CONTROL02.CTL
output filename=D:\ORACLE\ORADATA\TOTO\CONTROL03.CTL
Finished restore at 09-MAR-06
Step 3. after database mount, try to restore datafiles, which is failed
restoring datafile 00024 to D:\ORACLE\ORADATA\TOTO\DIN36\TESTUNV1.ORA
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of restore command at 03/09/2006 17:24:25
ORA-19505: failed to identify file "D:\DBBACKUPS\TOTOBKP.RMAN"
ORA-27041: unable to open file
OSD-04002: unable to open file
O/S-Error: (OS 2) The system cannot find the file specified.
Why it is looking old backup totobkp.rman which is not existing on disk ? My
backup name is t1.bkp.
Will you pl tell me where I have gone wrong ? Secondly what are the correct
steps to be followed for taking cold backup and restoration.
thanks & regards
pjp

Okay let us ponder this for a moment:-
DB NOARCHIVELOG
It does not matter when you take the backup of controlfile because the database is in mount state and no changes are allowed to the db ( Checkpoints etc. )
DB ARCHIVELOG
It does not matter when you take the backup of controlfile because the database is continuously writing to the archivelog's.
End result should not be significantly different as to worry about whether to take backup of control file before or after backup.
Thanks
Gopal

ACS 5.3 incremental backup error

Hi ,
I have ACS 5.3 that recently having problems with the incremental backup.
The error is : on demand back failed
and the details is: SQL Anywhere backup utility connection error: insufficient system resources- failed to allocate a SYSV semphorenull .
I mean come on.... and I did not find this error on cisco website.
The ADE.log file is not showing errors/details related to this. Atttached are the files showing the errors
Have anyone faced this problem before? Ideas? Anything?
Regards,
George

Hi George:
with 5.3 I experienced many issues including the incremental backup does not work. whenever I set it to "ON" next time the scheduled backup comes It fails and set itself back to "Off'. I did not get same message you get though.
I finally did two things:
- upgraded to latest patch.
- moved the log collector from the primary to the secondary.
Now things are fine for about 1 month without issues.
Regarding your issue, I think it could be related to resource issue as mentioned in the message.
What is the current DB size that you have?
Note that the message is misleading (messages I got with my ACS are the same) because they mention incremental backup in the message title and then say on-demand full backup failed!
So, you have to specify yourself if the issue with the incremental backup or the full backup?
HTH
Amjad
Rating useful replies is more useful than saying "Thank you"

Time Machine won't do incremental backups after I restored my computer

I am using a macbook (2010 version) and operating Lion. I had a problem with my Macbook where it wouldn't log on, even in safe mode, so I restored it using Timemachine. Now that everything is back up and running well I want to keep backing up. But Time Machine now says that there is not eneough space on the backup disk as it wants to back up the whole computer alongside the exisitng back up. In short it will no longer do incremental backups on top of what has already been backed up. I don't want to wipe my backup disk for fear that something might go wrong again and I may want to go back to a version earlier than the one I restored. Is there anyway of getting round this problem? It seems like a fairly serious problem.
I would appreciate any help.

ms364 wrote:
I am using a macbook (2010 version) and operating Lion. I had a problem with my Macbook where it wouldn't log on, even in safe mode, so I restored it using Timemachine.
When you erased the disk, it got a new UUID (Universally Unique IDentifier), which is treated like a different drive, and Time Machine will back it up in it's entirety.
Did you do a full system restore, starting from the Recovery HD? If so, that should have left a "trail" so Time Machine should have automatically "associated" the restored disk with the existing backups.
If you did it "piecemeal," though, via the "Star Wars" display, it won't (that doesn't leave the trail for TM to figure out what happened).
You might be able to get it to do the association manually. See #B6 in Time Machine - Troubleshooting.
But Linc is right; you apparently need a larger TM drive. See #1 in Time Machine - Frequently Asked Questions.

How to restore using increment backup after full backup restore in RMAN?

Hi All,
We have a files of full backup of database after turning on the Archive log.
And after that, daily incremental backup is taken.
Now, i want to restore the the database into a new machine using both files of full and incremental backups. Can anybody give me script for restore of full backup and after that restore of incremental backup?
Thanks,
Praveen.

Praveen,
>>
In my case, i have 2 sets of backups. One is full backup and other is incremental backup. In order to keep the restored database upto date, i need to restore the full backup and then restore incremental backup. Now, i got any idea how to restore using full backup. My doubt is how to update the restored database with incremental backup also?
>>
Restore always looks for level 0 backup, not the incremental backups.
Incremental backups comes in picture during recovery.
During Recovery, Oracle looks for incremental backups, if exists, it will do the recovery with the incremental backups, if no incremental backups available, then, it will look for archived logs.
Therefore, incremental backups never used during restore, they are used only during the recovery.
Jaffar

Is incremental backup possible for archivelog.

Hi expert
i want to plan weekly and daily backup with windows redundancy 14 days.
full archivelog backup script
run
BACKUP AS COMPRESSED BACKUPSET
INCREMENTAL LEVEL = 0
DEVICE TYPE DISK
TAG = 'WEEKLY_ARCHIVELOG'
FORMAT '/oracle/ITB/db/apps_st/rman_backup/weekly_archivelog_%d_t%t_s%s_p%p'
ARCHIVELOG FROM TIME 'SYSDATE-7';
daily backup script
run
BACKUP AS COMPRESSED BACKUPSET
INCREMENTAL LEVEL = 1
DEVICE TYPE DISK
TAG = 'DAILY_INCREMENTAL_ARCHIVELOG'
FORMAT '/oracle/ITB/db/apps_st/rman_backup/daily_incremental_archivelog_%d_t%t_s%s_p%p'
ARCHIVELOG FROM TIME 'SYSDATE-1';
my question that if i will take backup then, will be any gap in sequnce
and second question is that ---is there incremental backup possible for archivelog.
os =aix6 and database 10g2

afzal wrote:
Dear Sir,
ok question number 2 is clear that incremental backup is not possible but still confuse
about sequence
if i did take backup of 17 feb at 12 o'clock seq 1,2,3,4
after that i did take backup 18th fab 1 pm then it will take from 6,7,8-------seq 5 is missing
please please correct my archive log script for weekly and daily backup with windows redundancy 14 days
again please correct my script
thnaksWHy you think the archive log file number 5 will be missing? RMAN automatically archives current redo log files and backups it
Why you don't test your backup script by your own and check results? Never trust anyone on your critical databases' backups, do it by your own!
Kamran Agayev A.
Oracle ACE
My Oracle Video Tutorials - http://kamranagayev.wordpress.com/oracle-video-tutorials/

Robocopy wont reset archive attribute with /M switch..incremental backup to zip folder...partially RESOLVED!!!

hello, OS server 2012, 2008 r2, w7 ult.
I want to make backup only files which have archive attribute set. /M switch is what I need but robocopy wont reset archive bit from subfolders and only reset bit on files in root of source folder. How to force robocopy to reset archive bit from all copied
files???
This is syntax:
@echo off
set year=%date:~10,4%
set month=%date:~4,2%
set day=%date:~7,2%
SET Now=%Time: =0%
SET Hours=%Now:~0,2%
SET Minutes=%Now:~3,2%
Robocopy c:\source c:\dest /m /s /r:1 /w:1 /log:"c:\dest\Incremental_%month%-%day%-%year% %hours%h-%minutes%m.log" /NP
"C:\Program Files\7-Zip\7z.exe" a -tzip -mx1 C:\c\Incremental_%month%-%day%-%year%-%hours%h-%minutes%m.zip C:\dest
echo Y | DEL C:\Temp\*.*
I can use attrib command but I have in working folder 900.000 files so this is not option.
edit....robocopy work as expected in 2012 standard. /M switch reset archive attribute so I can use robocopy for incremental backups.
Script: c:\a is source and c:\b is destination. c:\b\temp is temporary folder from where 7zip package backed up files to archive. After 7zip finish jod script delete all files folders from temp folder. I want to use zip archive because this will be much
easier for file system. With time I will have some zip files instead 10000000 files or folders. Zip files will have in name date and time for easier tracking.
@echo off
set year=%date:~10,4%
set month=%date:~4,2%
set day=%date:~7,2%
SET Now=%Time: =0%
SET Hours=%Now:~0,2%
SET Minutes=%Now:~3,2%
Robocopy c:\a c:\b\temp /s /m /r:1 /w:1 /log:"c:\b\temp\Incremental_%month%-%day%-%year% %hours%h-%minutes%m.log" /NP
"C:\Program Files\7-Zip\7z.exe" a -tzip -mx1 C:\b\Incremental_%month%-%day%-%year%-%hours%h-%minutes%m.zip C:\b\Temp
set folder="C:\b\temp\"
cd /d %folder%
for /F "delims=" %%i in ('dir /b') do (rmdir "%%i" /s/q || del "%%i" /s/q)

Hi,
Thank you for your helpful sharing! This will help others who are fighting with similar issues.
Regards,
Mandy
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About incremental backup

Dear Friends ,
We have a ORacle 10g database server which is 24x7 hours running . We take everyday RMAN full backup ,now we want to run "Incremental rman backup" 6 days in a week and "Full Backup" rest of the week . But in oracle article we read that
"RMAN can only create incremental backups of datafiles, not of archived redo log files or other files."
(source: http://download.oracle.com/docs/cd/B19306_01/backup.102/b14192/bkup001.htm#BRBSC131)
In this moment I think , archivelog is very important for database recovery and it is necessary to take archivelog backup regularly .Now if we want to run Incremental backup then I think I cannot take "archivelog" backup using following script :
run
allocate channel t1 type 'sbt_tape' parms
'ENV=(TDPO_OPTFILE=/usr/tivoli/tsm/client/oracle/bin64/tdpo.opt)';
sql "alter system switch logfile";
backup incremental level 1 database plus archivelog;
Give me some idea plz ... ...what should I need to ?

Sorry Hemant ,
Accroding to ur advice , I run the script following way :
run
allocate channel t1 type disk;
backup incremental level 1 database;
sql "alter system switch logfile";
backup archivelog;
But I got the following ERROR :
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-00558: error encountered while parsing input commands
RMAN-01009: syntax error: found ";": expecting one of: "all, from, high, like, logseq, low, scn, sequence, time, until"
RMAN-01007: at line 6 column 18 file: standard input
RMAN>
But when I use the following script , it shows no error :
run
allocate channel t1 type disk;
sql "alter system switch logfile";
backup incremental level 1 database plus archivelog;
I think here database is backup only using LEVEL 1 , but archivelog is backed up full . Here is the output :
RMAN> run
2> {
3> allocate channel t1 type disk;
4> sql "alter system switch logfile";
5> backup incremental level 1 database plus archivelog;
6> }
using target database control file instead of recovery catalog
allocated channel: t1
channel t1: sid=159 devtype=DISK
sql statement: alter system switch logfile
Starting backup at 29-JUL-08
current log archived
channel t1: starting archive log backupset
channel t1: specifying archive log(s) in backup set
input archive log thread=1 sequence=2 recid=1 stamp=661354070
input archive log thread=1 sequence=3 recid=2 stamp=661354123
input archive log thread=1 sequence=4 recid=3 stamp=661354895
input archive log thread=1 sequence=5 recid=4 stamp=661354935
input archive log thread=1 sequence=6 recid=5 stamp=661355047
input archive log thread=1 sequence=7 recid=6 stamp=661355050
input archive log thread=1 sequence=8 recid=7 stamp=661355072
input archive log thread=1 sequence=9 recid=8 stamp=661355327
channel t1: starting piece 1 at 29-JUL-08
channel t1: finished piece 1 at 29-JUL-08
piece handle=C:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\TESTDB\BACKUPSET\2008_07_29\O1_MF_ANNNN_TAG20080729T143725_48
channel t1: backup set complete, elapsed time: 00:00:06
Finished backup at 29-JUL-08
Starting backup at 29-JUL-08
channel t1: starting incremental level 1 datafile backupset
channel t1: specifying datafile(s) in backupset
input datafile fno=00001 name=C:\ORACLE\PRODUCT\10.2.0\ORADATA\TESTDB\SYSTEM01.DBF
input datafile fno=00003 name=C:\ORACLE\PRODUCT\10.2.0\ORADATA\TESTDB\SYSAUX01.DBF
input datafile fno=00002 name=C:\ORACLE\PRODUCT\10.2.0\ORADATA\TESTDB\UNDOTBS01.DBF
input datafile fno=00004 name=C:\ORACLE\PRODUCT\10.2.0\ORADATA\TESTDB\USERS01.DBF
channel t1: starting piece 1 at 29-JUL-08
channel t1: finished piece 1 at 29-JUL-08
piece handle=C:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\TESTDB\BACKUPSET\2008_07_29\O1_MF_NNND1_TAG20080729T143732_48
channel t1: backup set complete, elapsed time: 00:00:15
Finished backup at 29-JUL-08
Starting backup at 29-JUL-08
current log archived
channel t1: starting archive log backupset
channel t1: specifying archive log(s) in backup set
input archive log thread=1 sequence=33 recid=32 stamp=661358270
channel t1: starting piece 1 at 29-JUL-08
channel t1: finished piece 1 at 29-JUL-08
piece handle=C:\ORACLE\PRODUCT\10.2.0\FLASH_RECOVERY_AREA\TESTDB\BACKUPSET\2008_07_29\O1_MF_ANNNN_TAG20080729T143751_48
channel t1: backup set complete, elapsed time: 00:00:02
Finished backup at 29-JUL-08
Starting Control File and SPFILE Autobackup at 29-JUL-08
piece handle=D:\RMAN_BACK\CFC-2444681464-20080729-0C comment=NONE
Finished Control File and SPFILE Autobackup at 29-JUL-08
released channel: t1
RMAN>
what u think , am i right ?

Incremental Backup (Exp & Imp) Oracle 9i(9.2.0.1)

I have used oracle 9i (9.2.0.1) version , i want to take incremental backup for a particular user... is it possible? if yes what is the actual command please tell me.

exp user/pass PARFILE=exp.par
In the exp.par
INC=Y
buffers=10000
log=exp.log
but before exporting check the permissions for the specified user.
Hope this helps

Restore using incremental backup with noarchivelog mode

Hello experts,
We are running SAP on Oracle databse(IN NOARCHIVELOG MODE) for which we are having full offline backup on every sunday and post which incremental backups on rest of the days. We have scenario to do restore db to the state till last friday's incremental backup.
Please let us know the procedure for restoring till that point. If possible using brtools utility(which is SAP specific).
Thank You
Regards,
Venkateshwar

If you do not want to read the whole doc This is the snippet for you.
Recovering a NOARCHIVELOG Database with Incremental Backups
Restoring a database running in NOARCHIVELOG mode is similar to restoring a database in ARCHIVELOG mode. The main differences are:
Only consistent backups can be used in restoring a database in NOARCHIVELOG mode.
Media recovery is not possible because no archived redo logs exist.
You can perform limited recovery of changes to a database running in NOARCHIVELOG mode by applying incremental backups. The incremental backups must be consistent, like all backups of a database run in NOARCHIVELOG mode, so you cannot make backups of the database when it is open.
When you are recovering a NOARCHIVELOG database, specify the NOREDO option on the RECOVER command to indicate that RMAN should not attempt to apply archived redo logs. Otherwise, RMAN returns an error.
To recover a NOARCHIVELOG database with incremental backups:
After connecting to the target database and the recovery catalog, place the database in a mounted state:
STARTUP FORCE MOUNT
Restore and recover the database.
For example, you can perform incomplete recovery with the following commands:
RESTORE DATABASE
FROM TAG "consistent_whole_backup";
RECOVER DATABASE NOREDO;
Open the database with the RESETLOGS option.
For example, enter the following command:
ALTER DATABASE OPEN RESETLOGS;

Incremental backup in noarchive log

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