# Pastebin C2v5Dpoz $ sudo fsck.ext4 -f /dev/mapper/loop114p2 e2fsck 1.45.5 (07-Jan-2020) ext2fs_open2: Bad magic number in super-block fsck.ext4: Superblock invalid, trying backup blocks... fsck.ext4: Bad magic number in super-block while trying to open /dev/mapper/loop114p2 The superblock could not be read or does not describe a valid ext2/ext3/ext4 filesystem. If the device is valid and it really contains an ext2/ext3/ext4 filesystem (and not swap or ufs or something else), then the superblock is corrupt, and you might try running e2fsck with an alternate superblock: e2fsck -b 8193 or e2fsck -b 32768 /dev/mapper/loop114p2 contains a vfat file system labelled 'ubuntu-seed'