Extundelete is a utility to undelete files from an ext3 or ext4 partition.
I was able to recover all data! I had a lot of trouble getting it running. The "-o directory" options seems to be bugged. extundelete version 0.2.4 libext2fs version 1.42 I figured out that I had to go to the directory where i wanted to have the backup and just run "extundelete --restore-all /dev/sdb1".