At 26,Dec. 2005, Got a call from a friend that , his db's rbs tablespace increased over 6GB cause some block corruption of a rbs, and he shutdown the db server, then restart, but found that the r02 cannot mark available with the smon, Then I suggest him do like following:
1. Add the parameter "_corrupt_rollback_segments"=(R02);
2. Shutdown and restart the db.
3. Drop the rollback segment and the rbs tablespace;
4. create tablespace and rollback segment
5. exp all data from db.
6. delete the db and re-create them and imp.
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