Gowtham?
Can you do us a favour?
Can you test this one?
I have worked on mass storage, for this silicon Image issue (an older sil 3112r clashed with ATI sil3112r) and some other things for Intel.
you are the perfect person to test this, I really think this one ought to fix the problems we had.
we had a test version here, and not all mass storage updates work.
I am deleting links.
See, if this one works, then it will work on more machines that that one specially made for you.
(and it was made because of your issue, anyway)
You can keep the DISC that worked in a safe spot (fallback), and make a new one with this pack.
I can understand if you don't want to format again, tho.