managing ntfs drives on linux
You need the package ntfs-3g to manage ntfs drives on linux.
When you attach an NTFS drive which was recently used on a windows computer, it might contain a sleep image and refuse to let you mount it writable.
sudo apt-get [or yum] install ntfs-3g
sudo ntfsfix /dev/sdb2
sudo ntfs-3g /dev/sdb2 /mnt/ntfs/ -o remove_hiberfile
assuming the drive is your second drive partition 2