Moving from 10gR2 Db on Unix (Tru64) to a new Linux server (10gR2)

Hi,
We are planning on moving our oracle 10gR2 Db on Unix (Tru64) to a new Linux server (same database 10gR2). Interested in discussing the easiest way for a newbie to get the data over to the new box. We currently perform a 'COLD" backup and have no transaction logging. The database is a data warehouse so stopping the database and backing up the files is not a issue. The database size is 500GB.
The Oracle ADDM on our current box is showing "individual database segments responsible for significant user I/O". There is a tablespace with about 30 separate data files that need to be "reorganized"!
Should we perform the reorganize before the migration or after on the new faster box?
What is the easiest way to do this for a newbie? Thanks.

Since your source and target platform all little ENDIAN format. Cold copy from OS level is fastest and easiest way.
If you plan to reorg the tablespace along the way, you have to do export/import, use data pump since you are on 10g.

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