Nothing seems to be working.I think, usb has some-kind of physical write protection switch (somewhere,which i don't know)
on its hardware. (USB drive was  one of my old data card - I give up for now - may be get back at this some time later. :)) .. thanks for all your suggestions and time.


--
----
Cheers,
Lakshmipathi.G
FOSS Programmer.
www.giis.co.in