I have used several versions of CWM recovery on my Motorola Droid 2.
One of them was able to back up into a
system.ext3.tar) as opposed to the
.img files that I am getting now.
Now I can't seem to find that version anymore; can someone tell me which version was able to do that?
(Currently running v184.108.40.206 from http://www.clockworkmod.com/rommanager)