ubuntu 8.04有时候会出现这个问题：
Cannot Mount Volume - Ubuntu 8.04 - external usb ntfs drive
do the fallowing code to get ntfs-3g:
可以用下面方法解决：
sudo mount -t ntfs-3g /dev/sda6 /media/disk -o force
or add the option to the relevant row in the /etc/fstab file:
/dev/sda5 /media/disk ntfs-3g force 0 0
sudo mount -t ntfs-3g /dev/sda5 /media/disk-2 -o force
or add the option to the relevant row in the /etc/fstab file:
/dev/sda5 /media/disk-2 ntfs-3g force 0 0