OK There seems to be a little confusion about my previous post.. That post was written in a hurry so I couldnot explain the details.
Let me explain my problem
At first the output I had posted was not the complete output. Mine is a 40GB hardrive of which 10 GB is a linux partition and about 25 if FAT32 and the remaining for NTFS..
I just pasted the output where the problem is ..
Actually it *is* a 10GB partition ( 9.9 GB to be exact ) and Linux *was* showing the 9.9 GB as the total available capacity ( i.e the used space and available space totalled 9.9 GB ) for the first few weeks. Suddenly it started showing that the full capacity of my hard-disc in 9.9 GB of which the usable part is only 9.4 GB .. Also it says that 'Disc space full" when the Used space reaches 9.4 GB. Is it a problem with my hard-disc..