Oracle 9i Standalone to 10g RAC ??

We have Oracle 9i on Solaris 9 with about 2 TB of data/index on SAN. We want to migrate this to 2 new boxes running Solaris 10 and Oracle 10g RAC -- storage SAN. What should be the best approach considering:
1. Fastest copying method for data/index from existing system (Solaris 9/Oracle 9i -> Solaris 10/Oracle 10g -- all on separate machines).
2. No return to 9i, once it 10g, stay Stanalone and/or RAC.
3. If 10g Standalone to RAC creates problem, stay on 10g Standalone and try later.
4. If ASM creates any issue, stay non-ASM/RAW files and try later.
Thanks.

Hi Sairam,
Due to the size of our Production environments we have decided not to pursue the MCOD option.
Eg: Take a QA environment which consists of SRM and BW and we have multiple nodes with both installed on each node. Now if I were to go the MCOD option then these instances can connect to one large Oracle File System using different schema's. 
What I'm trying to establish is in that one RAC, is it possible to have the multiple database instances on each node (SRM, BW etc) connect to multiple Oracle File Systems ie SRM connect to its own OFS and BW to its own instead of the one large shared OFS?
Hope this makes sense! Easier if I could upload a diagram!
Regards,
Chengappa

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