Check the inventory files's location:
In UNIX: /var/opt/oracle/oraInst.loc
In Linux: /etc/oraInst.loc
Content of oraInst.loc:
inventory_loc=/ORACLE/Inventory_Location
inst_group=GROUP_NAME
GROUP_NAME - can be oinstall / dba etc.
In UNIX/LINUX:
% $ORACLE_HOME/oui/bin/runInstaller -silent -ignoreSysPrereqs -attachHome ORACLE_HOME="ORACLE_HOME_LOCATION" ORACLE_HOME_NAME="ORACLE_HOME_NAME"
In Windows:
> setup.exe -silent -ignoreSysPrereqs -attachHome ORACLE_HOME="ORACLE_HOME_LOCATION" ORACLE_HOME_NAME="ORACLE_HOME_NAME"
Example:
% /ORACLE_SOFTWARE/11202/oui/bin/runInstaller -silent -ignoreSysPrereqs -attachHome ORACLE_HOME="/ORACLE_SOFTWARE/11202" ORACLE_HOME_NAME="Oracle112g_HOME1"