Error: dbspace chunk

Hi people, I'm in my 4th weeek trying to get Informix up and running! The following are extracts from some of my configuration files that I think will help you diagnose my situation: Extract from /opt/informix/etc/onconfig ROOTNAME rootdbsROOTPATH /dev/online_root ROOTOFFSET 0 ROOTSIZE 2000 .. ..PHYSDBS rootdbs PHYSFILE 1000 SERVERNUM 0 DBSERVERNAME demo_on Extract from /etc/profile INFORMIXSERVER=demo_onexport INFORMIXSERVER Now, here are my questions. 1. The variable DBSERVERNAME in onconfig is the one I took and placed for INFORMIXSERVER in /etc/profile. Is that the correct value for the INFORMIXSERVER variable? If not, how do I determine the correct value? 2. The Rootdbs! Can somebody explain this one for me. In the onconfig file, does the value(string) online_root refer to a directory or a file? How can I create a dbspace that conforms with the above onconfig file (names and paths)? [ so far I had created online_root as a file under /dev, owner/group=informix/informix, but still the initialisation was complaining that both owner ID and grp ID must be informix This is how I had done it: $ touch online_root $ chown informix online_root $ chgrp informix online_root $ chmod 660 online_root ] 3. What is the minimum size of a rootdbs? Thank you all for your responses Jerry.