Prof Karmarkar a product of IITM, working at TIFR completed the basic design of the supercomputing system with funding from Mr Tata and the Infosys Chairman, Mr N.R. Narayana Murthy. His project for dev of a system with a budget of Rs 400 crores, however could not be supported by TIFR which has an annual budget much less than that.
Ratan Tata comes as saviour- he agrees to pump in Rs 400 crores. CDAC had done it before when super computers were denied to India , now it is more commercial to take on IBM.
See : http://www.thehindubusinessline.com/2006/05/06/stories/2006050604270100.htm