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using mount -o loop,ro /index/image.dd /mnt/img under Ubuntu 15.10
Or is there a correct to take certain chunks of my disk, I am only going 3G per day, there is only 100G of real data I want to get out of this 1 TB disk, and I have a pretty good idea where the files are located..
dd does cloning, meaning it expects everything to match up on a sector-by-sector basis. If you just waht to copy files, a much better choice is rsync, available for most operating systems. It maintains the most recent update if two files have the same name in the same folder for synchronization purposes. It also allows the source or destination to be networked rather thsn local. And it allows multiple selections for include or exclude, and these can be set up as lists if you like.