Check Metalink Note #*1013221.6. * On 1/18/08, Prasad <p4cldba@xxxxxxxxx> wrote: > > As you mentioned I keep getting the same error no matter what i do . > I tried already doing offline drop of undo datafile on mount while > setting > _*offline_rollback*_segments > > _*corrupted_rollback*_segments > > _*allow_resetlogs*_corruption > > even the oracle support suggest me to go ahead and copy a full backup . so > I will take it as a learning and go back copy files. > > thanks everybody. > > -Prasad > > > > > On Jan 18, 2008 1:00 PM, Jeremiah Wilton <jeremiah@xxxxxxxxxxx> wrote: > > > Prasad, > > > > The error you are getting from open is that the UNDO tablespace > > datafiles > > are missing. Specifying _corrupted_rollback_segments will not solve > > that > > problem. If you would like to move on to the *next* error you are going > > to > > receive, then you can re-create the controlfile with the UNDO datafiles > > removed, or you can OFFLINE DROP them from MOUNT mode. > > > > Notably, the method of saving time/space you devised is simply invalid. > > You > > need undo in order to create a consistent database. You can technically > > open it without UNDO, but the result will range from inconsistent in the > > best case, to constantly crashing in the worst. > > > > For those performing real recoveries of production data, I think this > > group > > is a great place to learn about extraordinary recovery methods, such as > > how > > to allow resetlogs/read only corruption, specify corrupted rollback > > segments, and artificially advance the SCN. But for those like you who > > are > > willfully persisting in a flawed approach, the desire to help, at least > > on > > my part, is greatly reduced. > > > > Please just go back and get a copy of the UNDO tablespace which at 16G > > is > > really not that big. It doesn't matter if it takes 20 hours to make the > > copy, as long as you can bring it all consistent with archivelogs. As > > with > > others, I recommend taking a more conventional approach to this project. > > I > > don't believe you will be providing your clients with a test system that > > is > > consistent with professional standards if you continue on your current > > path. > > > > Regards, > > > > Jeremiah Wilton > > ORA-600 Consulting > > > > > > Prasad wrote: > > > > > Yes, it shows correctly printed in the alert log . but when I try to > > do > > show parameter it do not show . does > > > that mean it is effective on the background? but if it is effective > > then > > when I try to open in resetlogs it > > > should not complain about undotbs . but right now it complains. > > > > > > >