Today I discovered 'ntfsclone' which is included in debian in the 'ntfsprogs' package.
For example if you wanna try to backup your /dev/hda3 to a remote host:
foobar:~ # ntfsclone --save-image --output - /edv/hda3 | \
ssh $remotehost '( cat > xp.img )'
remotehost:~ # cat xp.img | ssh $foobar \
'(ntfsclone --restore-image --overwrite /dev/hda3 - )'
Maybe you you also will have a look into 'ntfsresize'! ;-)