Metalink has the answers.
See Note 430278.1 Can you restore RMAN backups taken on 32-bit Oracle
with 64-bit Oracle? and then 62290.1 Changing between 32-bit and
64-bit Word Sizes.


On 8/1/07, Arnon, Yuval <Yuval.Arnon@(protected):
> My plan is to migrate an Oracle 10.2.0.3 Win2003 32 bit to an Oracle
> 10.2.0.3 Linux 64bit RH 4.
> Have any of you guys ever tried to use RMAN backup/restore function to
> copy
> the Win32 DB to Linux 64 bit DB?
> What I need to be able to achieve is that the Win 32 DB be active while
> I do the RMAN backup, than I restore the DB using RMAN on Linux.



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Alex Gorbachev, Oracle DBA Brewer, The Pythian Group
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