You can use the new FULL_DISK_INIT configuration parameter to prevent the major problems that can occur if you or someone else accidentally initializes your instance or another instance when the first page of the first chunk (page zero) exists at the root path location. Page zero, which is created when Informix is initialized, is the system page that contains general information about the server.
The FULL_DISK_INIT configuration parameter specifies whether or not the disk initialization command (oninit -i) can run on your Informix instance when a page zero exists at the root path location. When this configuration parameter is set to 0, the oninit -i command runs only if there is not a page zero at the root path location. (If you change the setting of the FULL_DISK_INIT configuration parameter to 1, the oninit -i command runs under all circumstances, but also resets the FULL_DISK_INIT configuration parameter to 0 after the disk initialization.)
This feature is just one of many new useful features in Version 11.70xC1.