Whenever you try to access an NTFS partition in CentOS/RHEL for the first time, you might get the following message ( as of now ) :

Filesystem driver is not installed

To get over this, you might want to install the ntfs driver for the partitions to mount up.

If you are on a centOS box, give in the following :

# yum install fuse-ntfs-3g 

( You might need an  rpmforge repo for ^  package to be installed )

 
# wget http://packages.sw.be/rpmforge-release/rpmforge-release-0.3.6 1.el5.rf.i386.rpm (select the repo file for the correct system architecture )

# rpm -ivh rpmforge-release-0.3.6-1.el5.rf.i386.rpm

Once the repo is installed, install the driver using yum.