Now that being said, even if you have windows, you have to be careful when doing it.
You have to move the drive to another machine in order to be able to accomplish that, since you can't convert a live volume.
The command to use to do the conversion is:
convert <drive_letter>: /FS:NTFS
Note: Always keep in mind that when dealing with anything to do with partitions, make sure that you have a current backup, in case something goes wrong.
http://askubuntu.com/questions/303091/convert-fat32-partition-to-ntfs-without-data-loss
برای مشاهده مشخصات دیسک ها پاریتیشن ها هم از گزینه blkid استفاده کنید