Restoring ext3 partition on ubuntu?

Question

linux

There was a nuisance: when installing ubuntu, a 100 Gb partition on the sata-screw flew off. The system sees it as ext4 even though it was actually an ext3 partition. Neither paragon/acronix from a usb flash drive nor testdisk help: acronix does not detect the partition at all, paragon and testdisk see ext4. Searching superblock and fsck don't help.
I tried all the recovery options that I found on the net, but I have a distinctive snag: the partition did not disappear anywhere, it just suddenly became ext4 from ext3 and stopped mounting automatically. Manual mount => empty disk.
Now I'm running through R-studio, I hope to save at least something ...

Thanks for any ideas and help.

Answer 1

It turned out to be partially restored using
www.linux.org.ru/forum/general/2160714

mkfs.ext3 -S /dev/sdb7 
fsck.ext3 -y /dev/sdb7