Can higher version corrupt lower version databse ?

Dear Experts,
Oracle 9.2.0.6, HP-UX
Oracle 10.2.4 HP-UX
Can a database be corrupt in following situation:
1. export ORACLE_HOME=9iHome
2. export PATH=9iPath
3. database is working fine as it is created in 9i
4. Shut immediate;
5. copy parameter file from 9i to 10g home
6. export ORACLE_HOME=10gHome
7. export PATH (Oracle 10g path) ---> started with 10g
8. sqlplus "/ as sysdba"
9. startup
10. shut immediate
11. export ORACLE_HOME=9iHome
12 export ORACLE_PATH=9iPath
13 startup
What will be result ? will database refuse to open ?
Thanks & Regards
Sunil Kumar
Edited by: sunil kumar on Sep 4, 2011 8:27 AM

It should refuse to startup as the first startup in this scenario would need to be a startup upgrade or a startup migrate, whatever applied to 10g.
Evidently, this is discussed in the migration manual, and evidently this is why your question is redundant in this forum.
Sybrand Bakker
Senior Oracle DBA

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