[INS-40404] The installer has detected a configured instance of Oracle grid infrastructure software on the server.
Cause:
When installing oracle grid for a server,this error pops up because of improper cleanups of the previous grid software directories and files.I hope i can save your time,by giving you this solution
Cause - You selected to install and configure a new Oracle grid infrastructure installation (Oracle Clusterware and Oracle ASM). However, only one installation of Oracle Clusterware and Oracle ASM can be configured on a server at the same time.
Action - Deconfigure the existing Oracle Grid Infrastructure software before installing and configuring a new instance of Oracle Grid Infrastructure software.
Solution:
These culprit registry files though it acts as pointer for ASM disks cause this error and disallow you to go forward to the next step!
Take a backup of these files
[root@exdbadm01 oracle]# cp ocr.loc ocr.loc.bkp
[root@exdbadm01 oracle]# cp olr.loc olr.loc.bkp
Then remove ocr.loc and olr.loc files and continue your installation
[root@exdbadm01 etc]# cd /etc/oracle
[root@exdbadm01 etc]# rm -rf ocr.loc
[root@exdbadm01 oracle]# ls
cell ocr.loc.orig olr.loc.orig scls_scr
lastgasp olr.loc oprocd setasmgid
[root@exdbadm01 oracle]# rm -rf olr.loc
Hope it works and save your time 🙂
AlPhAGEeK369 