ROOTPATH specifies the full pathname, including the device or filename, of the initial chunk of the root dbspace. ROOTPATH is stored in the reserved pages as a chunk name.
On UNIX, you must set the permissions of the file that ROOTPATH specifies to 660, and the owner and group must both be informix. On Windows NT, a member of the Informix-Admin group must own the file that ROOTPATH specifies.
If you use raw disk space for your initial chunk on UNIX, It is recommended that you define ROOTPATH as a symbolic link to the raw device instead of entering the actual device name . For a rationale for using symbolic links rather than device names, refer to creating links to each raw device in the chapter on managing disk space in the IBM Informix: Administrator's Guide.
In Extended Parallel Server, the ROOTPATH parameter specifies the full pathname, including the device or filename, of the initial chunk of the root dbspace on each coserver. You can list this parameter in the global section of your ONCONFIG file and use the following formatting characters to apply the ROOTPATH parameter to all coservers.