Recovering ext4-Partition: "Large File Sparse SB Backup SB"

[PhilippL]

Hello,
I had Linux on my notebook with 2 primary partitions, system and data, both ext4. Then I had to switch to Windows and changed the second partition to a logical FAT32-partition. Then I realised what I had done and that my backup is a couple months old. Stupid decision.

Here are screenshots from testdisk:





It says "Large File Sparse SB Backup SB" and testdisk doesn't show me any files: "filesystem may be damaged"

Is there any chance to recover the data from the partition at least partialy?

Thank you very much, Philipp

[cgrenier]

To try to recover your ext4 partition, use the arrow keys to switch this partition to P(rimary).
On next screen, choose Write, confirm, Quit
After a reboot, run again TestDisk, Advanced, select the Linux partition, SuperBlock, use the information to run fsck.
You can run fsck from a Linux LiveDVD/LiveUSB.
If fsck failed to repair your filesystem, use PhotoRec to recover your data. PhotoRec will not recover the original filenames.
Good luck

[PhilippL]

Thank you very much for your help!

I did run fsck with this result:


Now the filesystem looks like this:


Should I run fsck manually, like fsck recommends?