mount: wrong fs type, bad option, bad superblock on /dev/mapper/testvg-testlv

Issue

• Mount failed with below error:

  # mount <mount-point>
  mount: wrong fs type, bad option, bad superblock on /dev/mapper/testvg-testlv
  

• e2fsck failed with below error:

  e2fsck: Bad magic number in super-block while trying to open /dev/mapper/testvg-testlv
  

• tune2fs fails with the following error:

  tune2fs: Bad magic number in super-block while trying to open /dev/mapper/testvg-testlv
  Could not find a valid superblock for the filesystem.