Applies to ONTAP 9 Answer It is not possible to modify the LUN OS type after a LUN has been created. A workaround is to create a new LUN and use host tools to copy data from the old to the new LUN. Ad...Applies to ONTAP 9 Answer It is not possible to modify the LUN OS type after a LUN has been created. A workaround is to create a new LUN and use host tools to copy data from the old to the new LUN. Additional Information additionalInformation_text