The ODBC Driver Manager stores driver and datasource information in
ini files or the system registry.
See the ODBC Driver Manager documentation for the exact path for these ini
files.
Microsoft Windows
The odbc.ini and odbcinst.ini files are located in the c:\winnt directory. The Microsoft ODBC Driver Manager looks up these files or the registry at runtime when an application requests a connection to a datasource.
UNIX
Information about the ODBC Driver installed on the system is saved in the odbcinst.ini file. This file is typically located at /etc/odbcinst.ini.