LV fails to deactivate with: "Logical volume MyVG/MyLV contains a filesystem in use"

Solution Verified - Updated -

Issue

  • Cannot deactivate a Logical Volume(LV). File system is unmounted but still getting file system in use error message:
lvchange -an /dev/mapper/MyVG-MyLV
  Logical volume MyVG/MyLV contains a filesystem in use.

Environment

  • Red Hat Enterprise Linux 6
  • LVM

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