We have finished upgrading the Core and Edge Server successfully,
But how can we upgrade WSM Image from V 6.X to 7.1 ?
Is it normal patching procedure ?
correct, upgrading the WSM Client Software in the Image is done via patch procedure.
Having said this, if you want to use the new Application virtualization Feature that is leveraging layering Technology, this requires a Version 7 Image and thus you would have to create a new Image for this. Same applies if you think aheaf of using User Profile layering, which requires a version 8 Image.
The create a new OS Image without re-installing the Reference Device manually, you can use Reverse Image Capture process as described in the WSM Sizing and Planning Guide.