Backup method in Noarchive mode

Hi All,
I have one question regarding backup methods. I have my all database in Oracle11gR2 in Noarchive mode. I want to define some backup method but no idea which one is preferable in noarchive mode. Cold backup is again not possible. can I take tablespace/datafile backup ? Is there any other option which I can perform in Noarchive mode or temporarily put the database in Archive and perform the backup?
Please guide me.
Thanks...

user12115 wrote:
Hi All,
First of all thanks for your reply and suggestions. I have not lost the interest but reading and thinking on all your suggestion.
About expdp yes I think this is the only option I was thinking before post a question here. but as we know this is should not consider as a backup.
For Archive mode - this is R&D database and we have disk space issue if we can not put database in Archive mode.
For COld backup - again not possible because single database uses in different time zone so DB should be up and running almost all the time.I think the operative word there is "almost". How big is the database? How long does it take to shut it down, back it up, and bring it back up? Unless the database is really big (why would an r&d database be really big, unless r&d was specific to VLDB) you should be able to do the job during the guy's lunch break. Even for an r&d database, you might be able to justify noarchivelog, but you will really feel the pain if you get a physically corrupted database and all you have is an export.
>
The only one option which I am not aware is what about John speicified. John can you please suggest or forward me some link with some backup example for more details. this is really helpful to me. From your suggested link I understand this is possible but after put the database in suspend mode how do I copy the Tablespace/datafiles - just simple Linux cp command or some other options also?
Edited by: user12115 on Mar 5, 2013 5:08 AM
Edited by: user12115 on Mar 5, 2013 5:15 AM

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>
Hi I have a test database in noarchivelog mode. The backup I am implementing involves:
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>
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user13286861 wrote:
ok it finally shutdown cleanly.
I altered it in archivelog mode.
Now I can run a backup database command from rman?What does it cost to try it and see? What would be the worst thing that could possibly happen? An error message saying you can't do that?
And please note, this forum is not a chat line. Operators are NOT standing by. Posting a new message every two minutes to give an update on the fact that the database hasn't shut down yet is not necessary and not productive.
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