Environment and RAID best practices please...

hello dears...
I have a scenario that I've never been to and its a very important one, so that I would like to receive some tips of you experts...
I'll have to run Oracle 10.2.0.1.0 on Windows server 2003 ENTERPRISE edition on the following scenario:
A server that contains RAID10 with 6 Hard disks and a STORAGE that also contains a RAID 10 with 6 more disks...
How would be the best for Oracle for the best performance ? Split User data and index or let it to RAID10 and split redo and archives
Like that:
SITUATION 1Server:
USER DATA, TEMP TS
Storage:
USER INDEX, REDO and ARCHIVEs
SITUATION 2Server:
USER DATA, USER INDEX, TEMP
Storage:
REDO and ARCHIVES..
Are there any tips for that ? How the best way to split the files into this scenario ?
Any kind of help would be appreciated.
Regards

I would like to put UNDO with the User data rather 
than Index..... pretty difficult to explain but will 
be better i think and one more thing INDEX can be 
with archives 
That's an interesting thought and makes sense. Are there any other whitepapers to endorse this view? 
 
I asked a RAID Disk Layout advice for Hybrid OLTP/Batch app earlier in regards to disk layout with an index closer to thet. 
 
I understand the reasons for separating archive logs and redo logs out, but I wasn't so sure about undo/data/index/temp. I've separated data/index obviously but I wasn't sure if dedicating an entire other RAID 1+0 pair for UNDO and a pair for TEMP seemed efficient. Oracle's whitepapers (see this one on S.A.M.E and this ASM-centric one) seem to point to a "stripe and mirror everything" approach to eliminate any bottlenecks by virtue of spreading absolutely as far as you can across as many spindles as you can. I'm uncertain at what 'threshold' this appears to take effect, as it seems to only apply to larger SANs and not disk arrays that are in the 10-15 disk range. 
 
Does anybody else have experience with this 'medium-sized' layout range?

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Message was edited by:
Dietmar Aust
Corrected a typo in (5): Approach B instead of approach A , sorry.
Message was edited by:
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