I was able to open it by entering:
sudo debugfs
open -b 65536 /dev/sdb4
No idea yet on how to recover my data…
EDIT:
Yeah i found it, using de rdump command, i was able to recursively dump a directory to the "native" filesystem
this is what i did:
sudo debugfs
open -b 65536 /dev/sdb4
(use ls to check if you are in the correct system)
cd /shares/Public
ls
// look in the listing for the dir you want to backup (i wanted my music back so i chose: Shared Music)
// Press Q to exit the listing
rdump "Shared Music" /home/realbase/Desktop/musicbackup
WHEAHAH!