Best hard drive backup software

Does anyone know of any good free hard drive backup software?  Ghost isn't free, and all I could find is this shitty thing that can only do a sector-by-sector backup because it doesn't understand NTFS, end result being that I've got a 160 GB hard disk image for a disk whose used space is under three gigs.  Not easy to store away for backup.

So, TIA

I'm quite fond of cp. I believe the equivalent under DOS is copy.

rsync is powerful. Easy to do differential/incremental backups with it.

rdiff-backup sounds good as well but I haven't tried that yet.