Suppose I am keeping old Oracle Home for safer side and installing new Oracle Home on another mount point.
So waht will happen to existing '/etc/oratab' and '/etc/oraInst.loc' file?
It will be overwrited or new files will created?
If it is overwriting that old files then at the time deinstallation of old Oracle home it can remove new Oracle home's files....
1)Your /etc/oratab would be updated with new home details.
2)You can deinstall old oracle home
Use dbua to upgrade your databases, its quite easy and simple
dbua -silent -sid <>
No there is no impact for new ORACLE_HOME (220.127.116.11) installed when you perform deinstall of old ORACLE_HOME (18.104.22.168).
Generally its not advisable to deinstall till you feel post upgrade the database is stable. If you need to use the old ORACLE_HOME for some reasons you will be with no options but to perform install again or copy from some other location.