I did a fsck.ext4 on a unmountet filesystem:
fsck -yv /dev/data/GrandCentralStation
After this the files had the right size, names and even the right rights and ownerships!
The only problem is, that those files have all been zero-filled by fsck, so they are now useless...
I checked many files with a Hex-Editor and every larger file has only zeros as "data".
So my question is now: Is there some way to "undo" the fsck?
Can i repair the fs by using the journal and backup-superblock (iīm not sure how to this correct right now, either by using fsck options i didnīt read yet, or by using file-carvers like ext4magic, testdisk/photorec, scalpel).