Partclone is a project like the well-known backup utility "Partition Image" a.k.a partimage. Partclone provide utilities to back up used blocks and design for higher compatibility of the file system using supported library like e2fslibs.
This is a kind of Scandisc or Checkdisk program for debian based linux systems. It scans your ext4 and BTRFS disks and repair them. Github: https://github.com/shampuan/ExtFS-Check-Tool