Hi Experts
I have recently performed a hardware migration which included a unicode conversion and oracle upgrade. The oracle upgrade went from 10 to 11.2.0.3.0. I have noticed a new file in the oracle_home\database folder and I am unable to find out information about it. It looks like a backup of the control file (which I have the standard 3 copies in other directories already setup). I would like to know if this files is essential to restore/disaster recovery - so I now need to ensure the control file is in 4 places or can I use this file to restore the other 3 controlfiles in case of the disaster recover scenario but the database will still start without it.
Many Thanks
Liz