Migration from Oracle 9i database to 10g in ECC5

Hi Experts,
We are planning to move our production system which is currently running ECC5 on AIX OS and Oracle 9i database to AIX OS and Oracle 10g database.
Some doubts regarding the above procedure:
1)Is there any possibility of SAP system migration from Oracle 9i to Oracle 10g. If yes, do we need to perform any addinitional steps for that?
2)If the above condition is OK, then what type of system copy should we need to follow: Homogeneous or Heterogeneous? Heterogeneous system copy is ususally done incase of system copy involving different databases. Does that apply for differnt versions too like Oracle 9i and 10g?
Any response is highly appreciated.
Regards,
Sanjay

If i'm using the dbua then the above issue will be solved by dbua itself?Well, DBUA will only perform a sanity check on your current release and if it doesn't pass it will fail. In other words DBUA will not upgrade your 9i release to the proper compatible release that you have to do before upgrading to 10R2.
Personally I never used DBUA, I always prefer manual upgrades, DBUA is good for you bcz it will not allow you to miss any step while upgrading.
What is the size of the database which you are going to upgrade?
Daljit Singh

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Marcello CESARO
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Application Architect
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Migration from Oracle 9i database to 10g in ECC5

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