so I did a very stupid thing (fortunately not on purpose). I had missing superblocks on a ext4 partition, which was encrypted by luks and sitting on an mdadm raid 5. For some reason I ran mke2fs on it (/dev/md1) and managed to ignore the warning that this is a Luks partition. I stopped after it wrote a few inodes.
Now the system will not detection it as a luks partition anymore and luksOpen, etc. fails, which, I guess, makes sense. Currently testdisk is running a deepsearch but I have little hopes.
Anything that comes to mind? The situation is not absolutely dire, since I do have most of the data backed up. Yet, if I could keep the data added between the backup and now (mostly media, ~500GB), I'd certainly be very happy.
Has anyone any leads on how to continue or should I give up?