I have been doing my own backups using rsync to a remote computer. However, due to the recommendation to have a full computer backup before upgrading to OS X 10.10 Yosemite, I am trying to undertake the task of setting up Time Machine so as to back up not only my own files, but other users on the machine as well.
My concern is whether or not Time Machine will preserve hard links. I have about a couple hundred gigabytes of images that I have organized using hard links, such that every image is duplicated several times. My external drive for use with Time Machine is 1TB, and there are about 500GB of actual unique data on the drive. However, if hard links are not preserved, the figure will be more like 2TB, which I don't have. In the past (like 4 years ago), I have read that TM didn't preserve hard links. Is that still the case?
Obviously I would like to try an experiment on my machine, but it seems like it might not go well if I don't have the space.