I have this new 1TB hard-drive from Sandisk for the purpose of taking backup from my linux (Redhat) based linux system, but when i try to use it, a dialouge box comes saying that u do not have NTFS system installed on your system. Please help how can i make use of this hard drive.
Your options are to reformat the drive or to install ntfs-3g on the system.
To reformat the drive, type this:
sudo mkfs.ext2 partition (partition is probably /dev/sda1 or /dev/sdb1)
I'm not quite sure how to install ntfs-3g on Redhat. I just searched my yum repos and it doesn't look like it's offered. You'll have to find another repo, download the rpm somewhere, or build it from source.
It's much better just to use a native filesystem though. So my recommendation is to reformat the drive.