The Unmount option will make sure that the Host does not see that as a datastore and it will says as unmount but you can again mount it.
Delete option is will delete the vmfs partition , so that you can again use that lun for any other filesystem.
The Unmount option will make sure that the Host does not see that as a datastore and it will says as unmount but you can again mount it.
Delete option is will delete the vmfs partition , so that you can again use that lun for any other filesystem.