I have an old filesystem backup that I made and compressed into a squashfs. It was stored on an ext4 filesystem, and I suspect it suffered from some bitrot. I don’t have a backup of the file. Is there any way I might be able to rescue this squashfs archive?
$ unsquashfs olddrive.sfs Can't find a SQUASHFS superblock on olddrive.sfs
Edit: Adding Info
$ file olddrive.sfs olddrive.sfs: data $ sudo mount -t squashfs -o ro olddrive.sfs /tmp/sq mount: /tmp/sq: wrong fs type, bad option, bad superblock on /dev/loop10, missing codepage or helper program, or other error.