Hi Subramaniyan Raja,
maybe you might get a good point to start if you had a look into the how-to you can find here:
http://scn.sap.com/docs/DOC-15995
We had a similar problem twice and were able make the needed data available again.
One of the cases was an real-time cube for the BI-IP, which was the only source of the data in question - hence we did not have much options to get the data from anywhere else.
But once again - as mentioned by the pre-posters: It's completly on your own risk.
Best regards,
Marco