Amit:
I assume that you are setting up a new instance, so you have to start it the first time with the -i flag to oninit. Given that you have tried once without that flag, the root may have had some data in it, so you should set the FULL_DISK_INIT parameter to '1' in the ONCONFIG file before you try to initialize the instance.
Art
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Art S. Kagel, President and Principal Consultant
ASK Database Management Corp.
www.askdbmgt.com------------------------------