Hi
Recovery process will read from undo$ table to identify all the rollback segments that were online. Even if you comment out the rollback segments from the init file, still Oracle knows what rollback segments were online from the undo$ table. If i remember correctly, after reading the undo$ table, the process will read at least the rollback segment header and then only it proceed to open the database. If that rollback segment is not available, then you will not be able to open the database without using the underscore parameters.
IMHO, Oracle support need to be contacted for further resolution..
Thanks
Riyaj "Re-yas" Shamsudeen
Certified Oracle DBA
i2 technologies www.i2.com
| "Rachel Carmichael" <[EMAIL PROTECTED]>
Sent by: [EMAIL PROTECTED] 08/14/01 08:40 AM
|
To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> cc: Subject: Re: How can I get my DB back if I lost one of my rollback segment (rb |
Hermanto,
some more information would be helpful -- why are you restoring? are you
restoring from a cold or hot backup?
if it was from a cold backup, you can comment out the rollback_segments
parameter in the init.ora and start the database. Then I would drop the
rollback tablespace and recreate it, with the rollback segments you want.
Then change the init.ora and shutdown and restart the database
Rachel
>From: Hermanto P <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]>
>Subject: How can I get my DB back if I lost one of my rollback segment (rb
>Date: Tue, 14 Aug 2001 00:35:21 -0800
>
>Hi gurus,
>Recently, I have forgotten to backup one of rollback segment file
>(rbs02.dbf).
>When I want to restore..the db can not startup normally.
>Anyone can give me advise..
>Thanks in advance.
>
>Warm regards,
>Hermanto
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