External USB Hard Disk (HDD) NTFS not detected in CentOS

External (USB) hard disk is not detected :

Install NTFS package in centOS

$ yum install fuse fuse-ntfs-3g

If it does not work, download rpm file and install using
ftp://ftp.muug.mb.ca/mirror/fedora/epel/6/x86_64/ntfs-3g-2011.4.12-5.el6.x86_64.rpm

$ rpm -i filename